关于整数大小排序的经典java示例

输入三个整数x,y,z，请把这三个数由小到大输出。  
import java.util.*;
public class lianxi15 {
public static void main(String[] args) {
     input fnc = new input();
     int x=0, y=0, z=0;
     System.out.print("输入第一个数字：");
      x = fnc.input();
     System.out.print("输入第二个数字：");
      y = fnc.input();
     System.out.print("输入第三个数字：");
      z = fnc.input();  
    if(x > y) {
      int t = x;
      x = y;
      y = t;
     }
    if(x > z) {
      int t = x;
      x = z;
      z = t;
     }
    if(y > z) {
      int t = y;
      y = z;
      z = t;
     }
    System.out.println( "三个数字由小到大排列为： "+x + " " + y + " " + z);
}
}
class input{
public int input() {
     int value = 0;
     Scanner s = new Scanner(System.in);
     value = s.nextInt();
     return value;
}
}

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