java compareTo减法值

我正在使用

Binarytree

和

removeNode(E value) method (E extends Comparable<E>), 

编辑：

然而，当我尝试

System.out.println(value.compareTo(root.getData());

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我得到value减去root.getData（）的值

这正是

compareTo

应该返回的结果：

返回：如下所示的负整数、零或正整数 对象小于、等于或大于指定对象

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参见

这是Short根据文档所做的：

如果此Short等于参数Short，则值为0；如果短参数的数值小于短参数，则值小于0；如果短参数在数值上大于短参数（有符号比较），则该值大于0

因此，如果要比较相等的短路，则应返回0：

Short s = new Short("12");
    Short anotherShort = new Short("12");
    if(s.compareTo(anotherShort) == 0){
        System.out.println("Equal");

    }
    else {
        System.out.println("Not Equal");
    }

应打印“不相等”

更明确的示例如下：

这张照片是：

 50 is less than 200, difference = -150
 50 is equal to 50, difference = 0
 200 is more than 50, difference = 150

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我们不能调试不可见的代码。在这里发布相关部分。ehm。。。什么？compareTo总是返回一个int。这有什么问题吗？你认为compareTo应该返回什么？编辑。我想它会返回1,0或-1。但是我得到了区别，这是一种可能的实现方法，但它实际上返回一个正数（不是零）、一个负数或零

System.out.println(value.compareTo(root.getData());

Short s = new Short("12");
    Short anotherShort = new Short("12");
    if(s.compareTo(anotherShort) == 0){
        System.out.println("Equal");

    }
    else {
        System.out.println("Not Equal");
    }

package com.tutorialspoint;

import java.lang.*;

public class ShortDemo {

public static void main(String[] args) {

// create short object and assign value to it
short val1 = 50, val2 = 200, val3 = 50;
Short Shortval1 = new Short(val1);
Short Shortval2 = new Short(val2);
Short Shortval3 = new Short(val3);

// returns less than 0 if this Short is less than the argument Short
int cmp = Shortval1.compareTo(Shortval2); 
System.out.println("" + Shortval1 + " is less than " + Shortval2 + ", difference = " + cmp);

// returns 0 if this Short is equal to the argument Short
cmp = Shortval1.compareTo(Shortval3); 
System.out.println("" + Shortval1 + " is equal to " + Shortval3 + ",difference = " + cmp);

// returns greater than if this Short is greater than the argument Short
  cmp = Shortval2.compareTo(Shortval1); 
  System.out.println("" + Shortval2 + " is more than " + Shortval1 + ",
 difference = " + cmp);
 }
}   

 50 is less than 200, difference = -150
 50 is equal to 50, difference = 0
 200 is more than 50, difference = 150