Chandrika: Created page with ''''Title of script''': Netbeans Debugger '''Author: Sindhu ''' '''Keywords: netbeans, debugging, debug''' [http://spoken-tutorial.org/wiki/images/1/18/Debugger-_Resources.zip…'

2012-11-27T12:38:49Z

Created page with ''''Title of script''': Netbeans Debugger '''Author: Sindhu ''' '''Keywords: netbeans, debugging, debug''' [http://spoken-tutorial.org/wiki/images/1/18/Debugger-_Resources.zip…'

New page

'''Title of script''': Netbeans Debugger

'''Author: Sindhu '''

'''Keywords: netbeans, debugging, debug'''

[http://spoken-tutorial.org/wiki/images/1/18/Debugger-_Resources.zip Resources for "NetBeans Debugger"]

{| style="border-spacing:0;"
| style="border-top:0.05pt solid #000000;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| <center>'''Visual Cue'''</center>
| style="border:0.05pt solid #000000;padding:0.097cm;"| <center>'''Narration'''</center>

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 1
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Hello everyone.

Welcome to the tutorial on '''Netbeans''' '''Debug'''ger.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 2

Introduction
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| If this is the first time you are using '''Netbeans''', please view the earlier tutorials on the '''Spoken Tutorial''' website.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 3

System Setup
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| For this demonstration, I am using the Linux Operating System Ubuntu v12.04,

and '''Netbeans''' IDE v7.1.1

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 4 & 5

'''Netbeans''' '''Debug'''ger
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We all know that '''debugging''' programs can be a rather painstaking task.

Hence, knowing a '''debugging''' tool and being familiar with its features can help you save valuable time.

This powerful '''debugging''' tool is very useful,

especially when you have to code or test large programs.

In this tutorial we will learn some of the features that the '''Netbeans''' '''Debug'''ger provides.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 6 & 7

Lesson Outline
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''This tutorial will acquaint you with'''

* the '''debugging''' window
* configuring breakpoints
* evaluating expressions (setting watches)
* options for tracing the execution of your program
* options to configure the '''debug'''ger itself

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Switch to '''Netbeans''' IDE
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now Let's get started and '''debug''' this sample code. I will switch to the Netbeans IDE

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the '''Workspace >> '''show the project '''sampleDebug'''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| I have already created a Java Application, '''sampleDebug''' in my IDE for this demonstration.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| In the '''Workspace '''>> highlight to show the variables ''a,b ''& ''c''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| This is a small program that initializes three integer values a, b, and c.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Highlight the line ''''System.out.println("Hello World! a is " + a);' '''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Then it prints 'Hello World!' and the value of 'a'.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Highlight the lines in the code snippet containing the '''class object '''and the line where the integer variable '''value '''is declared
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| It also creates a class object 'SampleClass', which has a 'value' integer, as a private integer value.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Highlight the line in the code containing the expression '''b=a+10'''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Then, it computes the value of 'b',

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Highlight the line in the code containing the expression '''c=getc(b);'''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| and calls a function to compute the value of c,

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Highlight the line in the code containing the statement ''''System.out.println("b is "+b+" and c is "+c);''''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| and prints the values of 'b' and 'c'.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Within the '''Source '''>> click on the l'''ine number '''containing the line

''''System.out.println("Hello World! a is " + a);''''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To start with the '''debugging''', let us first set the breakpoint.

To set a breakpoint, click on the line number.

I will set at this line which prints '''Hello World!'''

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the small '''pink square''' in the line number column
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Notice that the line at which a breakpoint is set changes it's colour to pink and is marked by a small square against its line number.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the highlighted line where the execution has stopped
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| When you run the program in the '''debugging''' mode,

by clicking on the '''Debug Project '''button in the toolbar,

the execution of the program stops at the line at which the breakpoint is located.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Hover the cursor over the variable '''a, '''to view it's value''' '''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| So far, 'a's value has been set.

Hover on it to check it's value.

It indicates that it's value is 10.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see that there are some additional windows below the workspace.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Open the '''Variables '''window below the workspace >> Point to the row containing the variable '''a'''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| There is a 'Variables' window that shows a list of variables and their values.

So far, only the variable 'a' has been initialized.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Re-focus the '''Output '''window below the workspace
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| We can also look at the 'Output' window with the sample '''debug''' output.

There is no output yet.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Re-focus the '''Debugger '''window below the workspace >> Highlight the line saying ' '''program hit a breakpoint on line 29''''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| There is also a ''''Debug'''ger Console' that says that the program hit a breakpoint on line 29 and has stopped there.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Re-focus the '''Breakpoints '''window below the workspace

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| There is also a 'Breakpoints' window that tells you that a breakpoint has been set on line number 29.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| '''Adding Watchpoint'''

In the Source editor, highlight the object ''''aSample'''<nowiki>; in the code</nowiki>
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Before proceeding, let us see how to add a watch.

For example, let us say I want to watch on the integer value ''''aSample''''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Re-focus the '''Variables '''window below the workspace >> double click to '''<nowiki><Enter the watch> </nowiki>'''>> Enter '''a.Sample.value '''>> Click on '''OK'''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| <nowiki>In the 'Variables' window below the workspace, I will double-click on <Enter the Watch> option and enter the name of the variable '</nowiki>'''aSample.value''''.

Click on '''OK'''.

So far 'aSample' has not been created so it says it does not know the value.

Once it executes the line we'll know what the variable contains.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| '''Evaluating Expressions'''

In the workspace >> highlight the expression '''b=a+10 '''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In a similar way you can also watch and evaluate expressions.

Here I'm checking for b=a+10.

What if I wanted to know what a-4 is.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Go to the '''Debug '''menu >> select '''Evaluate Expression'''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| So let me go to the '''Debug''' menu in the menu bar, and select '''Evaluate expression '''option.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to the '''Evaluate Code '''window >> Enter '''a-4 '''>> Click on the green evaluate button on the right side
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The ''''Evaluate Code'''' window appears in the workspace.

Here I enter the expression ''''a-4''''.

Click on the '''Evaluate Expression button''' here, and in the Variable window, it says ''''a-4''''s value is 6.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| '''Step-Over'''

Point to the line ''''System.out.println("Hello World! a is " + a);' '''>> click on '''Step-Over '''button below toolbar
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let's now proceed and execute this single line of code.

To do that, choose the Step-Over button from the toolbar.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Re-focus '''Output '''window >> show printed line >> '''Hello World! a is 10'''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| That should execute only that 1 single line (current execution line) of the code to print “Hello World”.

To see the output, go to the output window and choose the sampleD'''ebug''' output. That says, '''Hello World! a is 10'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| '''Step-Into'''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The program has now stopped (at the line) to create a SampleClass object.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| From the toolbar >> click on '''Step-Into '''option
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now, I want to go into the constructor of the SampleClass.

To that I can choose the Step Into option from the toolbar.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| From the toolbar >> click on '''Step-Over '''option
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Then I can choose Step Over and see that the value came inside the constructor call is now set to 10.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Move and hover the cursor over the variable '''val '''>> '''this.val '''is set to '''10'''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| I can also check that by hovering on the variable.

When I Step Over again, we can see that '''this.variable''' is now set to 10.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| '''Step-Out'''

'''From the toolbar >> click on Step-Out '''option
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| To get out of this function I can either choose Continue, Step Over or Step Out.

Let me choose Step-Out to come out of the method.

And now I'm back to where the function call was made.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| From the toolbar >> click on '''Step-Over '''option

Re-focus Variable window >> point to '''aSample.value '''>> value is set to '''10'''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| When I say Step-Over again, you will notice that '''aSample.value''' is now set to10.

This is what we were watching for.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| '''Run to Cursor'''

Place cursor near the line >> '''d=b-5;'''

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Apart from Breakpoints and StepOvers, you can also stop the execution of the program at the line of the cursor.

For example, let me go into the function here and set the cursor to be on this line which says '''d=b-5; '''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| From the toolbar >> click on '''Run to Cursor '''option
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now from the toolbar, choose the Run To Cursor option.

You will notice that the execution of the program gets into the function and stops at the line where the cursor is located.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| '''Show execution upto line'''

Re-focus the '''Variable '''window >> point to the variable '''b '''>> value is set to '''20'''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| You can see that it has computed the value of b, as 20.

And inside the variable window, it has set 'b' to be 20.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Re-focus the '''Variable '''window >> point to the variable '''d '''>> value is set to '''15'''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now, I can choose Step Over again and d's value also gets initialized and becomes 15.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now, I can either choose to return or completely finish the execution of the program.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| From the toolbar''' >> '''click on''' Step-Out '''option
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Let me choose Step Out and come back to the function call.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Move cursor over '''getC() '''>> value is '''15'''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| When you hover on the '''getC()''' function, you'll notice that the function has (returns) a value of 15.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| (variable) 'c' has not yet been assigned that value.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Re-focus the '''Variable '''window >> point to the variable '''c '''>> value is set to '''15'''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| So, when we Step Over and execute that line, 'c' will get a value of 15.

We can now check it in the variable window or hover on the variable to check it's value.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| '''Finish Debugger Session'''

Point to''' Finish Debugger Session '''option in toolbar
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now if you want to stop the '''debugging''' session, you can choose the '''Finish Debugger Session''' option from the toolbar.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Point to''' Continue '''option in toolbar
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| If you want to continue (the execution) to the next breakpoint you can choose the '''Continue '''option.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Click on '''Continue '''option
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Once you finish, you can also choose the Continue option to complete the execution of the (remaining) program.

Let me choose '''Continue '''here.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Re-focus '''output '''window to show output >> '''b is 20 and c is 15'''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| In the Output window, it shows me the output as: '''b is 20 and c is 15'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"|
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Now, this was a quick overview of the options of '''debugging''' on '''netbeans'''.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| '''Tools > Options > Miscellaneous > Java Debugger'''
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| If you want any advanced feature settings, you can -

Go to '''Tools '''menu, click on '''Options, '''go to '''Miscellaneous '''option, click on the '''Java Debugger '''tab.

Here you can change settings for multi-threaded program breakpoint (options). Or have filters to decide on which methods you would want to step in.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 8 & 9

Assignment
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Now to the assignment.'''

As an assignment, take any of your programs, excellent if it has already errors. If not, introduce some errors with the logic or algorithm.

# Set breakpoints in the code. Usually, you would set a break at the calling point of a function which you suspect has the error.
# Use '''Step-Into''' to go into the function.
# Use '''Step-Overs''' to execute the lines and make sure to inspect the values of variables in the variable window.
# Add some watches to help you identify and correct the error.
# Step-Out of the method.
# Continue till you reach the next breakpoint.
# Finish the '''debug'''ger session and Run your application.

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| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 10 & 11
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| '''Recap.'''

In this tutorial, we became familiar with the '''netbeans''' '''debug'''ger.

# We saw how to set breakpoints and watches.
# Add expressions which we want to evaluate, while the code is running.
# Trace execution of a program with Step-Into, Step-Over, Step-Out and Run-to-Cursor options.
# Also saw how to configure the '''debug'''ger for advanced '''debugging'''.

Hope this tutorial saves you a lot of time in your testing and '''debugging''' tasks.

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| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 12

About the Spoken Tutorial Project

| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Watch the video at the link shown on the screen.

It summarizes the Spoken Tutorial project.

If you do not have good bandwidth, you can download and watch it.

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 13

Spoken Tutorial Workshops
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team

* Conducts workshops using Spoken Tutorials
* Gives certificates to those who pass an online test
* For more details, contact us at [mailto:contact@spoken-tutorial.org contact@spoken-tutorial.org]<br/>

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| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 14

Acknowledgements
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| Spoken Tutorial Project is a part of the Talk to a Teacher Project.

It is supported by the National Mission on Education through ICT, MHRD, Government of India.

More information on this Mission is available at http://spoken-tutorial.org/NMEICT-Intro

|-
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:none;padding:0.097cm;"| Slide 15
| style="border-top:none;border-bottom:0.05pt solid #000000;border-left:0.05pt solid #000000;border-right:0.05pt solid #000000;padding:0.097cm;"| About the Contributor

This tutorial has been contributed from IT for Change

Thank you for joining us.

|}

Netbeans/C2/Netbeans-Debugger/English - Revision history

Chandrika: Created page with ''''Title of script''': Netbeans Debugger '''Author: Sindhu ''' '''Keywords: netbeans, debugging, debug''' [http://spoken-tutorial.org/wiki/images/1/18/Debugger-_Resources.zip…'