String 的equals方法和 Integer比较疑问

Question

Object object = 1;
System.out.println(object.getClass());
if("1".equals(object))
System.out.println("1");
else
System.out.println("惊了");

本以为走if   实际测试代码走到了else
请大佬解释下这个equals比较的是什么

Answer 1

看源码，先看是不是String类型

public boolean equals(Object anObject) {
        if (this == anObject) {
            return true;
        }
        if (anObject instanceof String) {
            String anotherString = (String)anObject;
            int n = value.length;
            if (n == anotherString.value.length) {
                char v1[] = value;
                char v2[] = anotherString.value;
                int i = 0;
                while (n-- != 0) {
                    if (v1[i] != v2[i])
                        return false;
                    i++;
                }
                return true;
            }
        }
        return false;
    }