this represents the class instance itself.
Usage of this
1. Indicates a reference to the current object!
public class A{
public A getA(){
return this;//表示獲取當(dāng)前實例本身
}
}2. Represents member variables of the class, not function parameters. Pay attention to distinguishing between function parameters and member variables when they have the same name!
public class A{
private int a = 0;//位置1
public A getA(int a){
this.a = a;//前面this.a表示 位置1 的a，賦值=號右側(cè)的表示參數(shù)a
}
}3. Used to reference the constructor that meets the specified parameter type in the constructor.
public class A{
public A(int a){
}
public A(){
this(1);//這里調(diào)用自身的構(gòu)造函數(shù)public A(int a){
}
}php Chinese website, a large number of free Java introductory tutorials, welcome to learn online!
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