public class TestInteger {
public static void main(String[] args) {
int i = 128;
Integer i2 = 128;
Integer i3 = new Integer(128);
System.out.println(i == i2); //Integer会自动拆箱为int，所以为true
System.out.println(i == i3); //true，理由同上
Integer i4 = 127;//编译时被翻译成：Integer i4 = Integer.valueOf(127);
Integer i5 = 127;
System.out.println(i4 == i5);//true
Integer i6 = 128;
Integer i7 = 128;
System.out.println(i6 == i7);//false
Integer i8 = new Integer(127);
System.out.println(i5 == i8); //false
Integer i9 = new Integer(128);
Integer i10 = new Integer(123);
System.out.println(i9 == i10); //false
}
}
