java中输入3个数，从大到小的输出。。。。

总结：我暂时不能理解，C语言时讲过，java里就不理解了

package com.a;
 
import java.sql.Date;
import java.util.Scanner;
 
//输入三个数，按从小到达的顺序输出
public class Test {
 
	public static void main(String[] args) {
		Scanner c = new Scanner(System.in);
		System.out.println("请输入3个数");
		int a = c.nextInt();
		int b = c.nextInt();
		int s = c.nextInt();
		System.out.println(a + "," + b + "," + s);
 
		int temp;
		if (a < b) {//b此时是temp。a是b/
			temp = a;
			a = b;
			b = temp;
 
		}
 
		if (a < s) {
			temp = a;
			a = s;
			s = temp;
 
		}
		if (b < s) {
			temp = b;
			b = s;
			s = temp;
		}
 
		System.out.println("结果：" + a + ">" + b + ">" + s);
	}
 
}