具有相同值的2个整数对象的原语int将指向其中的哪一个？[副本]

Question

int a = 30;
Integer b = new Integer(30);
if( b1 == b2)
    System.out.println("Hello");
else
    System.out.println("Hi");

输出：你好

对。因为a也会指向B的整数对象。这里还解释了：比较整数对象

class A2
{
    public static void main(String args[])
    {
        int a = 30;
        Integer b1 = new Integer(30);
        Integer b2 = new Integer(30);
        if(a == b1 && a == b2)
            System.out.print("Hello");
        else
            System.out.print("Hi");
        if( b1 == b2)
            System.out.print("Hello");
        else
            System.out.print("Hi");
    } //End of Method
}// End of class

Answer 1

编译器实际上将其更改为：如果(a==b1.intvalue()){}