//it will work for global declaration
String a = "aaa", b = "bbb";//default declaration not local variables
public static void main(String[] args) {
dummy d=new dummy();
System.out.println("Before swap "
+ "a = " + d.a
+ " b = " + d.b);
d.swap();
System.out.println("After swap "
+ "a = " + d.a
+ " b = " + d.b);
}
void swap(){
String temp = this.a;
this.a = this.b;
this.b = temp;
}
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