Java Program to show the use of "this" keyword

import java.io.*;
public class Demo_This{
    static int a;
    public void display(int a){
        a=10;//local variable.
        this.a=20;//Global variable.
        System.out.println(a);
        System.out.println(this.a);
    }

    public static void main(String[] args)throws IOException{
        Demo_This obj=new Demo_This();
        obj.display(a);
    }
}

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