Ashwini at 07:05, 25 November 2014

2014-11-25T07:05:14Z

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Ashwini at 07:04, 25 November 2014

2014-11-25T07:04:20Z

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Sneha at 06:02, 8 May 2013

2013-05-08T06:02:29Z

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Chandrika: Created page with ''''Title of script''': Strings in Java '''Author''': TalentSprint '''Keywords: '''datatype, char, strings, adding strings, video tutorial {| style="border-spacing:0;" | styl…'

2012-11-27T10:12:55Z

Created page with ''''Title of script''': Strings in Java '''Author''': TalentSprint '''Keywords: '''datatype, char, strings, adding strings, video tutorial {| style="border-spacing:0;" | styl…'

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'''Title of script''': Strings in Java

'''Author''': TalentSprint

'''Keywords: '''datatype, char, strings, adding strings, video tutorial

{| style="border-spacing:0;"
| style="border:0.035cm solid #000000;padding:0.097cm;"| '''Visual Cue '''
| style="border:0.035cm solid #000000;padding:0.097cm;"| '''Description'''

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Slide 1

'''Welcome'''
| style="border:0.035cm solid #000000;padding:0.097cm;"| Welcome to the spoken tutorial on '''Strings in Java'''.

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Slide 2

'''Learning Outcomes'''
| style="border:0.035cm solid #000000;padding:0.097cm;"| In this tutorial, you will learn how to

'''create strings''', '''add strings and perform basic string operations like converting to lower case and upper case.'''

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Slide 3

'''Tools Used'''
| style="border:0.035cm solid #000000;padding:0.097cm;"| For this tutorial we are using

'''Ubuntu 11.10''',

'''Eclipse 3.7 and JDK 1.6'''

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Slide 4

'''Prerequisites'''
| style="border:0.035cm solid #000000;padding:0.097cm;"| For this tutorial, you should have knowledge of '''data types in Java.'''

If not, for relevant tutorial please visit our website as shown

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Slide 5

'''Strings'''
| style="border:0.035cm solid #000000;padding:0.097cm;"| '''String''' in Java, is a sequence of characters.

Before starting with '''Strings, '''we will first see the character data type.

Let us now switch to eclipse

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Minimize Slides and open Eclipse

Eclipse should contain the following code

'''public class StringDemo{'''

'''public static void main(String<nowiki>[] </nowiki>args){'''

'''}'''

'''}'''
| style="border:0.035cm solid #000000;padding:0.097cm;"| we have the skeleton required for the rest of the code.

We have created a class by the name '''StringDemo '''and added the main method.

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Inside the main method, type

'''char star = '*';'''
| style="border:0.035cm solid #000000;padding:0.097cm;"| Inside the '''main''' method, type '''''char star '''equal to in single''' '''quotes''' star'''''

This statement creates a variable with name '''star '''and of the type '''char.'''

It can store exactly one character.

Let us print a word using a few characters.

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Type after the '''char...'''

'''char c1 = 'c';'''

'''char c2 = 'a';'''

'''char c3 = 'r';'''
| style="border:0.035cm solid #000000;padding:0.097cm;"| So type,

'''char c1 '''''equal to''''' c'''

'''char c2 '''''equal to''''' a'''

'''char c3 '''''equal to''' ''r'''

We have created three characters to make the word '''car'''.

Now let us use them to print the word.

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Type after '''char3...'''

'''System.out.print(c1);'''

'''System.out.print(c2);'''

'''System.out.print(c3);'''

Save and Run.

Point to output
| style="border:0.035cm solid #000000;padding:0.097cm;"| So type,

'''System.out.print(c1);'''

'''System.out.print(c2);'''

'''System.out.print(c3);'''

Please note that I’m using '''print''' instead of '''println''' so that all the characters are printed on the same line.

save and run the file.

As we can see, the output is as expected.

But this method only prints the word but does not create one.

To create a word, we use the '''String''' data type.

Let us try it out.

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Remove everything inside the '''main''' function and type the following.

'''String greet = “Hello Learner”;'''
| style="border:0.035cm solid #000000;padding:0.097cm;"| remove everything inside the main method and type

Type''' String greet '''''equal to '''''Hello Learner '''''in quotes'''''<nowiki>;</nowiki>'''

Note that the '''S '''in the data type '''String''' is in uppercase.

We have use double quotes as delimiters and not single quotes.

This statement creates a variable '''greet''' that is of the type '''String'''

Let us print the message.

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Type the following

'''System.out.println(greet);'''

Save and run.

Point to output
| style="border:0.035cm solid #000000;padding:0.097cm;"| So type,

'''System.out.println(greet);'''

Save and Run the file.

As we can see, the message has been stored in the variable and printed.

Strings can also be added in Java.

let us see how to do so.

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Change '''“Hello Learner”''' to '''“Hello“'''
| style="border:0.035cm solid #000000;padding:0.097cm;"| I'm removing the '''Learner''' from the message.

We'll store the name in a different variable.

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Type after the '''greet...''' line

'''String name = “Java”;'''

'''String msg = greet + name<nowiki>;</nowiki>'''

change '''println(greet)''' to '''println(msg)'''

Save and Run.

Point to output
| style="border:0.035cm solid #000000;padding:0.097cm;"| So type,

'''String name '''''equal to '''''“Java”;'''

Now we’ll add the strings to make a message

'''String msg '''''equal to '''''greet '''''plus '''''name<nowiki>;</nowiki>'''

change '''println(greet)''' to '''println(msg)'''

Let us run it.

We can see that the output shows the greeting and the name.

But there is no space separating them.

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Before '''String greet''' line, type this

'''char SPACE = ' ';'''

Change '''greet + name''' to '''greet + SPACE + name'''

Save and Run.

Point to output
| style="border:0.035cm solid #000000;padding:0.097cm;"| Let us create a space character<nowiki>;</nowiki>

'''char SPACE '''''equal to '''''' ';'''

Note that I have used all uppercase letters in the variable name so that it is clear.

You can change it as you want.

Now add the space to the message.

'''greet '''''plus '''''SPACE '''''plus '''''name'''

Let us run the file.

Now the output is clear and as expected.

Let us look at a few basic string operations.

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Change '''“hello”''' to '''“HeLLo”'''

Change '''“Java”''' to '''“jAvA”'''

Save and Run.

Point to output

| style="border:0.035cm solid #000000;padding:0.097cm;"| I’m changing a few characters of “Hello” to upper case

and a few characters of “java” to uppercase.

Often, when users give input, we have values like this, in mixed case.

Let us run the file to see the output.

The output is not clean.

Let us use the String methods to clean the input.

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Add the following code before '''System...'''

'''greet = greet.toLowerCase();'''

'''name = name.toUpperCase();'''

Save and Run.

Point to output
| style="border:0.035cm solid #000000;padding:0.097cm;"| So type,

'''greet '''''equal to '''''greet.toLowerCase();'''

This statement converts each character of the string '''greet''' to lowercase

Type '''name '''''equal to '''''name.toUpperCase();'''

This statement converts each character of the string '''name '''to uppercase.

Run the file.

As we can see, the output is now clean after we have used the String methods.

|-
| style="border:0.035cm solid #000000;padding:0.176cm;"|
| style="border:0.035cm solid #000000;padding:0.176cm;"| This is how we create strings and perform string operations.

There are many more String methods and

We'll discuss them as we move on to complex topics.

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Minimize the '''Eclipse''' window and switch to slides.

Slide 6

'''Summary'''
| style="border:0.035cm solid #000000;padding:0.097cm;"| We have come to the end of this tutorial.

In this tutorial we have learnt

'''- how to create strings and add them'''

'''- few string operations like converting to lower case and upper case'''

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Slide 7'''Assignment'''

| style="border:0.035cm solid #000000;padding:0.097cm;"| For self assessment,

- Read about the '''concat''' method of Strings in Java. - Find out how is it different from adding strings.

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Slide 8'''About the Spoken Tutorial Project'''

* Watch the video available at[http://spoken-tutorial.org/What_is_a_Spoken_Tutorial ][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial http][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial ://][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial spoken][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial -][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial tutorial][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial .][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial org][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial /][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial What][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial _][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial is][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial _][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial a][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial _][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial Spoken][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial _][http://spoken-tutorial.org/What_is_a_Spoken_Tutorial Tutorial]

* It summarises the Spoken Tutorial project

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

| style="border:0.035cm solid #000000;padding:0.097cm;"| To know more about the '''Spoken Tutorial''' project, watch the video available at the following link.

It summarises the Spoken Tutorial Project.

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

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Slide 9'''Spoken Tutorial Workshops'''The Spoken Tutorial Project Team

* Conducts workshops using spoken tutorials

* Gives certificates for those who pass an online test

* For more details, please write to [mailto:contact@spoken-tutorial.org contact][mailto:contact@spoken-tutorial.org @][mailto:contact@spoken-tutorial.org spoken][mailto:contact@spoken-tutorial.org -][mailto:contact@spoken-tutorial.org tutorial][mailto:contact@spoken-tutorial.org .][mailto:contact@spoken-tutorial.org org]

| style="border:0.035cm solid #000000;padding:0.097cm;"| The Spoken Tutorial Project Team.

Conducts workshops using '''spoken tutorials'''.

Gives certificates for those who pass an online test. For more details, please write to '''contact AT spoken HYPHEN tutorial DOT org.'''

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Slide 10'''Acknowledgement'''

* 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 http][http://spoken-tutorial.org/NMEICT-Intro ://][http://spoken-tutorial.org/NMEICT-Intro spoken][http://spoken-tutorial.org/NMEICT-Intro -][http://spoken-tutorial.org/NMEICT-Intro tutorial][http://spoken-tutorial.org/NMEICT-Intro .][http://spoken-tutorial.org/NMEICT-Intro org][http://spoken-tutorial.org/NMEICT-Intro /][http://spoken-tutorial.org/NMEICT-Intro NMEICT][http://spoken-tutorial.org/NMEICT-Intro -][http://spoken-tutorial.org/NMEICT-Intro Intro]

| style="border:0.035cm solid #000000;padding:0.097cm;"| '''Spoken Tutorial '''Project is a part of the '''Talk to a Teacher''' project and is supported by the '''National Mission on Education through ICT, MHRD, Government of India. '''More information on this Mission is available at '''spoken HYPHEN tutorial DOT org SLASH NMEICT HYPHEN Intro'''

|-
| style="border:0.035cm solid #000000;padding:0.097cm;"| Slide 11'''About the contributor'''

* This tutorial has been contributed by '''TalentSprint'''
* '''www.talentsprint.com'''

* Thanks for joining

| style="border:0.035cm solid #000000;padding:0.097cm;"| This tutorial has been contributed by '''TalentSprint'''. Thanks for joining.

|}

Java/C2/Strings/English - Revision history

Ashwini at 07:05, 25 November 2014

Ashwini at 07:04, 25 November 2014

Sneha at 06:02, 8 May 2013

Chandrika: Created page with ''''Title of script''': Strings in Java '''Author''': TalentSprint '''Keywords: '''datatype, char, strings, adding strings, video tutorial {| style="border-spacing:0;" | styl…'