싱글턴 패턴 예제

클래스 하나에 객체를 유일하게 하나만 생성하여, 모든 곳에서 하나의 객체만 접근할 수 있도록 함

전역의 개념으로 객체를 사용할 수 있게 됨

 

package temp1;

public class SingleTonClass {

	private static SingleTonClass singleTonClass = new SingleTonClass();

	public int i = 10;

	private SingleTonClass() {

	}

	public static SingleTonClass getSingleTonClass() {
		if (singleTonClass == null) {
			singleTonClass = new SingleTonClass();
		}

		return singleTonClass;
	}

	public int getI() {
		return i;
	}

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

}