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Example:Immutable Class

Immutable class is thread safe
Imuutable class objects cannot be modified
Examples :
IntegerString package com.demo.immutable;
//make ur class final
public final class MyImmutable {
 //make ur instance variables final
    final String s="Anjana";
    private String s2=null;
//access the private via constructors--to modify
    public MyImmutable(String s2) {
        super();
        this.s2 = s2;
    }
    public static void main(String args[]){
        MyImmutable  myimmutable=new MyImmutable("dff");
    }
}