Difference between revisions of "Java/C2/Method-overloading/English-timed"

|  So what we do is in the method instead of '''int''' we will give '''double'''.

|So replace '''''int'''''by '''''double'''''. Save the file  

|So here we can pass an integer arguments as well.

| Now  '''Save''' and '''Run''' the program

|  In the output we see the sum of two integers variables,

|And the sum of two numeric arguments that we passed.

|  Now we see that both the method performs same operation.

|The difference is that the first method  has no parameter. While the second method has  parameters.

|So in such case java provides us with '''method''' '''overloading'''.  

| So what we do is give same name to both the methods.

|So replace '''''addTwoNumbers''''' with '''''add'''''  also change here.

|  We will define one more method with same opearation.

|So type '''''void''' '''add'''.''

|And''Within parentheses '''int n1 '''comma '''int n2''' comma '''int n3.'''''

| Then Within curly brackets '''System''' dot '''out''' dot''' println'''.''

|''Within parentheses '''n1''' plus '''n2''' plus '''n3'''.''

|So this method will give sum of three numbers.

| let us call this method.

|So type '''''obj dot add''' '''1''' comma''' 5''' comma '''4'''''

| ''Save''' and '''Run'''   

| In the output we see the sum of three number i.e'''10'''

|So Java compiler overloads the proper method depending on the parameters.

|It checks the number and type of parameter passed

|So as a programmer we dont have worry about the method name.

|Nor even the type or number of argument we  passed.

|  We can create one more method which append strings.

|So we will create one more '''overload ''' method

|  type '''''void add''''' '''String''' '''s1''' comma '''String''' '''s2'''. ''

|''Within curly brackets '''System''' dot '''out''' dot '''println'''.''

|''Within parentheses '''s1''' plus '''s2'''.''

| And we will call  this method.

|So type '''''obj''' dot '''add'''.''

|''Within parentheses in double quotes '''Hello''' comma in double quotes space '''World'''.''

|  So in the output we see '''Hello''' space '''World'''.

|So the add method with two string arguments, appends the string.

|  Suppose now we declare add method with return type.

|So type '''int''' '''add''' parentheses  no  parameter and curly brackets.

|  We get an error  it states that '''duplicate method''' add in type addition

|So remember that to overload method the parameters must differ.

|Having different return types will not overload the method.

|So remove this method  and Save the file.

|This is how '''method overloading''' is done in '''java'''

|  So in this tutorial we learnt,

|About '''method overloading.'''

|To''' overload method.'''

| And advantage of '''method overloading.'''

|For self assessment, create a method subtract that subtracts number

|Overload it.  

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