Java/src/designpattern/singleton/Singleton.java at main · gjee22/Java

Repository navigation

package designpattern.singleton;

class Singleton {

private String attr = "Is this a singleton?";

private static class SingletonHolder {

// 변경되지 않게 파이널 선언

private static final Singleton INSTANCE = new Singleton();

}

// Singleton 인스턴스를 다음 메소드를 통해서만 받을 수 있게 함

public static Singleton getInstance() {

return SingletonHolder.INSTANCE;

}

public String getAttr() {

return this.attr;

}

public void setAttr(String str) {

this.attr = str;

}