In Java, this is the keyword for calling the variable in the class and the constructor of the inner class. When the object has a variable with the same name, the variable of the class can be specified.
Example 1:
package example_1;
import java.lang.*;
public class Xample_3 {
private static String a;
private static String b;
public Xample_3(){
}
public Xample_3 (String a,String B){
this.a = a ;
b = B;
/*
* In a constructor parameter, if the name of the parameter is the same as the variable name in the class, you need to use this to indicate the variable used.
* Here the variable a and the formal parameter a have the same name, so when calling, you need to use this.a to specify the a that uses the variable
* The variable b and the formal parameter B have different names, so the variable b can be used directly
*/
System.out.println("Reassign the a and b variables to the value in the construction class, a is equal to: "+this.a+"\nb is equal to: "+b);
}
public String getA(){
return a;
}
public String SetA(String a){
return this.a=a;
}
public void setAandB(String a,String b){
}
public static void main(String[] args) {
Xample_3 xample = new Xample_3();
Xample_3 xample_3 = new Xample_3("a1", "b1");
xample_3.SetA("aaa1");
System.out.println(xample_3.getA());
}
}
operation result:
In the construction class, the a and b variables are reassigned to the value, a is equal to: a1
b is equal to: b1
aaa1