int类型，String类型，double类型比较大小

package com.test.Test08;

public class Test01 {
    public static void main(String[] args) {
        /*//int类型比较大小
        int a = 10;
        int b = 20;
        System.out.println(a-b); //=0  >0  <0
        //res:-10*/

        //String类型比较大小
        /*String a = "A";
        String b = "B";
        System.out.println(a.compareTo(b));//-1*/

        //double比较大小
        double a = 9.6;
        double b = 9.3;
        //System.out.println(a-b);
        //System.out.println((int)a-b);
        //Double底层类里面也有compareTo这个函数
        System.out.println(((Double) a).compareTo((Double) b)); //1
    }
}