代码实现:输入3个数a,b,c，按大小顺序输出。

import java.util.Arrays;
import java.util.Scanner;

//输入3个数a,b,c，按大小顺序输出。
public class Test34 {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int[] arr = new int[3];
		int count = 0;
		int s = 0;
		;
		while (count <= 2) {
			System.out.println("请输入第" + (count + 1) + "个整数:");
			String ss = sc.nextLine();
			count++;
			try {
				s = Integer.parseInt(ss);
				arr[count - 1] = s;

			} catch (Exception e) {
				System.out.println("输入非法,请正确输入");
				count--;
			}
		}
		Arrays.sort(arr);
		for (int i = 0; i < arr.length / 2; i++) {
			int temp = arr[i];
			arr[i] = arr[arr.length - 1 - i];
			arr[arr.length - 1 - i] = temp;
		}
		System.out.print("这三个数的从大到小的排序为: ");
		for (int i : arr) {
			System.out.print(i + " ");
		}
	}
}