看下圖程式碼： 

public class Demo2_Integer {
	public static void main(String[]args) {
		Integer i1 = new Integer(97);
		Integer i2 = new Integer(97);
		System.out.println(i1 == i2);
		System.out.println(i1.equals(i2));
		System.out.println("-----------");
	
		Integer i3 = new Integer(197);
		Integer i4 = new Integer(197);
		System.out.println(i3 == i4);
		System.out.println(i3.equals(i4));
		System.out.println("-----------");
	
		Integer i5 = 97;
		Integer i6 = 97;
		System.out.println(i5 == i6);
		System.out.println(i5.equals(i6));
		System.out.println("-----------");
	
		Integer i7 = 197;
		Integer i8 = 197;
		System.out.println(i7 == i8);
		System.out.println(i7.equals(i8));
	}

}
 

執行結果：

false
true
-----------
false
true
-----------
true
true
-----------
false
true