java自动装箱陷阱

public class ZiDongChaiXiangXianJing {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Integer a=1;
		Integer b=2;
		Integer c=3;
		Integer d=3;
		Integer e=128;
		Integer f=128;
		Integer e2=127;
		Integer f2=127;
		Long g=3L;
		System.out.println("c==d  "+(c==d));
		System.out.println("e==f  "+(e==f));
		System.out.println("e2==f2  "+(e2==f2));
		System.out.println("c==(a+b)  "+(c==(a+b)));
		System.out.println("c.equals(a+b)  "+c.equals(a+b));
		System.out.println("g==(a+b)  "+(g==(a+b)));
		System.out.println("g.equals(a+b)  "+g.equals(a+b));

	}

}