输入三个字符串，按由小到大的顺序输出 字符串排序-一种简单的方法

/**
 * 对两位数的ascii是可以的
 * 对三位数的就不行了
 */
import java.util.Scanner;
public class 字符串排序 {
    
    public static int getMax(int x, int y) {
        return x>y?x:y;
    }
    public static int getMin(int x, int y) {
        return x<y?x:y;
    }
    public static int GetMiddle(int x,int y,int z) {
        int temp=0;
        if(x>y)
        {
            temp=x;
            x=y;
            y=temp;
        }
        if(z<x) return x;
        else if(z<y) return z;
        else return y;        
    }
    
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);
        String str1=scanner.next();
        String str2=scanner.next();
        String str3=scanner.next();
        int[] str1_num =new int[3];
        int[] str2_num =new int[3];
        int[] str3_num =new int[3];
        for(int i=0;i<3;i++) {
            str1_num[i]=Integer.valueOf(str1.charAt(i));
            str2_num[i]=Integer.valueOf(str2.charAt(i));
            str3_num[i]=Integer.valueOf(str3.charAt(i));
        }
        int n1=str1_num[0]*10000+str1_num[1]*100+str1_num[2];
        int n2=str2_num[0]*10000+str2_num[1]*100+str2_num[2];
        int n3=str3_num[0]*10000+str3_num[1]*100+str3_num[2];
        int max=getMax(n1, getMax(n2, n3));
        int middle=GetMiddle(n1, n2, n3);
        int min=getMin(n1, getMin(n2, n3));
        
        System.out.print((char)(min/10000));
        System.out.print((char)(min%10000/100));
        System.out.print((char)(min%10000%100));
        System.out.print(min);
        System.out.print((min/10000));
        System.out.print((min%10000/100));
        System.out.print((min%10000%100));
        System.out.println();
        System.out.print((char)(middle/10000));
        System.out.print((char)(middle%10000/100));
        System.out.print((char)(middle%10000%100));
        System.out.println();
        System.out.print((char)(max/10000));
        System.out.print((char)(max%10000/100));
        System.out.print((char)(max%10000%100));

        
    }

}

控制变量，逐步交换相邻的两个，直到确定最终顺序

import java.util.Scanner;
public class 字符串排序第二种方法 {

    public static void main(String[] args) {

        Scanner scanner =new Scanner(System.in);
        String str1=scanner.next();
        String str2=scanner.next();
        String str3=scanner.next();
        if(str1.compareTo(str2)>0) {
            String temp=str1;
            str1=str2;
            str2=temp;
        }
        if(str1.compareTo(str3)>0) {
            String temp=str1;
            str1=str3;
            str3=temp;
        }
        if(str2.compareTo(str3)>0) {
            String temp=str3;
            str3=str2;
            str2=temp;
        }
        System.out.println(str1);
        System.out.println(str2);
        System.out.println(str3);
        //System.out.println(str1+str2+str3);
        scanner.close();
    }

}