Java学习小代码（1）编写三个数的排序程序

使用程序为用户所录入的3 个数值进行升序排列，并将排序后的结果输出到控制台。（4种方法）

package day03;
//编写三个数值的排列顺序
import java.util.Scanner;
public class Sort {
	public static void main(String[] args) {
		   Scanner scan = new Scanner(System.in);
		   System.out.println("请依次输入三个整数：a,b,c（以空格隔开）");
		   int a = scan.nextInt();
		   int b = scan.nextInt();
		   int c = scan.nextInt();
		   System.out.println("您输入的是："+'\r'+"a="+a+",b="+b+",c="+c);
		 
		   //方法一，复杂
		   if(a>b) {
			   if(b>c) {
				   System.out.println("升序排序后，结果为："+'\r'+"c="+c+",b="+b+",a="+a);
			   }else {
				   System.out.println("升序排序后，结果为："+'\r'+"b="+b+",c="+c+",a="+a);
			   }
		   }else {
			   if(b>c) {
				   if(a>c) {
					   System.out.println("升序排序后，结果为："+'\r'+"c="+c+",a="+a+",b="+b);
				   }else {
					   System.out.println("升序排序后，结果为："+'\r'+"a="+a+",c="+c+",b="+b);
				   }
			   }else {
			   System.out.println("升序排序后，结果为："+'\r'+"a="+a+",b="+b+",c="+c);
			   }
		   }
          
		   //方法二
		   int max = 0;
		   int mid = 0;
		   int min = 0;
		   if (a>b && a>c) {
			   max = a;
		   }else if(b>a && b>c) {
			   max = b;
		   }else {
			   max = c;
		   }
		   
		   if (a<b && a<c) {
			   min = a;
		   }else if(b<a && b<c) {
			   min = b;
		   }else {
			   min = c;
		   }
		   
		   if((a>b && a<c) || (a>c && a<b)) {
			   mid = a;
		   }else if((b>a && b<c)|| (b>c && b<a)) {
			   mid = b;
		   }else {
			   mid = c;
		   }
		   System.out.println(min+" "+mid+" "+max);
           
		   //方法三
		  if(a>b) {
			   if(c>a) {
				   System.out.println("升序排序后，结果为："+'\r'+"b="+b+",a="+a+",c="+c);
			   }else if(c<b) {
				   System.out.println("升序排序后，结果为："+'\r'+"c="+c+",b="+b+",a="+a);
			   }else {
				   System.out.println("升序排序后，结果为："+'\r'+"b="+b+",c="+c+",a="+a);
			   }
		   }else {
			   if(c<a) {
				   System.out.println("升序排序后，结果为："+'\r'+"c="+c+",a="+a+",b="+b);
			   }else if (c>b) {
				   System.out.println("升序排序后，结果为："+'\r'+"a="+a+",b="+b+",c="+c);
			   }else {
				   System.out.println("升序排序后，结果为："+'\r'+"a="+a+",c="+c+",b="+b);
			   }
		   }
		   
		   //方法四
		   if(a>b) {
			   int t = a;
			       a = b;
			       b = t;
		   }
		   if(a>c) {
			   int t = a;
			       a = c;
			       c = t;
		   }
		   if(b>c) {
			   int t = b;
			       b = c;
			       c = t;
		   }
		   System.out.println("升序排序后，结果为："+'\r'+"a="+a+",b="+b+",c="+c);
	}

}