Java黑皮书编程练习题6.05（对三个数排序）

使用下面的方法头编写方法，按升序显示三个数：
public static void displaySortedNumbers(double num1, double num2, double num3)
编写程序，提示用户输入3个数字，调用方法以升序显示它们

import java.util.Scanner;

public class Exercise06_05 {
    public static void displaySortedNumbers(double num1, double num2, double num3) {
        double temp;
        //先把num1定位,然后把num2,num3比较
        if (num1 > num2) {
            temp = num1;
            num1 = num2;
            num2 = temp;
        }
        if (num1 > num3) {
            temp = num1;
            num1 = num3;
            num3 = temp;
        }
        if (num2 > num3) {
            temp = num2;
            num2 = num3;
            num3 = temp;
        }
        System.out.println(num1 + " " + num2 + " " + num3);
    }

    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        double num1 = input.nextDouble();
        double num2 = input.nextDouble();
        double num3 = input.nextDouble();
        displaySortedNumbers(num1, num2, num3);
    }
}