About java in this summary of some

 

this is used in the constructor, when using a different constructor argument list, if there is another constructor and a constructor function the same, then this constructor can call the constructor function uses

 

format:

 

this (value);

 

 

 

class Test

 

{

 

Test () {....} / / empty argument constructor

 

 

Test (Datatype var) / / constructor with an argument

 

{

 

this ()

 

....

 

}

 

 

Test (Datatype var1, Datatype var2) / / constructor takes two arguments

 

{

 

this (var1);

 

........

 

}

 

 

Test (Datatype var2, Datatype var2, Datatype var3)

 

{

 

this (var1, var2);

 

.......

 

}

 

}

 

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this is used in the constructor

 

format:

 

this.function (value);

 

 

class Test

 

{

 

public void function () / / function without parameters

 

{

 

function 1;

 

}

 

 

public void function (Datatype var) / / with a function of the parameter

 

{

 

function 1;

 

function 2;

 

}

 

 

public void function (Datatype var1, Datatype var2)

 

{

 

function 1;

 

function 2;

 

function 3;

 

......

 

 

/ / equivalent to using

 

/ / this.function (var1); / / ==> Function 1; function 2;

 

/ / Function 3;

 

}

 

}

 

 

 

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