ImmutableClass.java

package objects.immutableclass;

import java.util.ArrayList;
import java.util.List;

/**
 * Make a class immutable.
 * http://javarevisited.blogspot.com/2013/03/how-to-create-immutable-class-object-java-example-tutorial.html
 * User: rpanjrath
 * Date: 10/22/13
 * Time: 4:02 PM
 */
public final class ImmutableClass {

 // make all variables final
 private final int anInt;
 private final String string;

 // making list final won't make it immutable. You can use getList and then perform add on it.
 private final List<String> list;

 public ImmutableClass(int anInt, String string, List<String> list) {
 this.anInt = anInt;
 this.string = string;
 this.list = list;
 }


 public int getAnInt() {
 return anInt;
 }

 public String getString() {
 return string;
 }

 public List<String> getList() {
 List tempList = new ArrayList();
 tempList.addAll(list);
 return tempList;
 }

 // REMOVE ALL SETTERS
 /*
 public void setString(String string) {
 this.string = string;
 }

 public void setAnInt(int i) {
 this.anInt = i;
 }

 public void setList(List list) {
 this.list = list;
 }
 */
}