如何在Java中进行冒泡排序以输出已排序的数字？ [英] How to make Bubble Sort in Java to output the sorted numbers?

问题描述

这是我的冒泡排序代码。我无法获得输出的实际排序值。程序读取输入的数字，但不打印排序。
我不确定我要做什么才能让它们排序。
任何建议或建议都会有所帮助。

This is my code for the Bubble Sort. I cannot get the actual sorted values to output. The program reads the inputted numbers, but does not print it sorted. I'm not sure what I have to do to make them sort. Any advice or suggestions would be helpful.

package sortingalgorithm2;
import java.util.Scanner;

public class Main {

/**
 * @param args the command line arguments
 */
public static void main(String[] args)
{
    Scanner read = new Scanner (System.in);
    int[] num = new int[15];
    int size = 15;

    System.out.println("Enter 15 numbers: ");
    for (int i=0; i <= size-1; i++)
    {
        num[i] = read.nextInt();

    }

    for (int i=0; i <= size-1; i++)
    {
        if (num[i] >=1 && num[i] <= 1000)
       {
        System.out.println("The numbers you entered are: ");
        System.out.println(+num[0]);
        System.out.println(+num[1]);
        System.out.println(+num[2]);
        System.out.println(+num[3]);
        System.out.println(+num[4]);
        System.out.println(+num[5]);
        System.out.println(+num[6]);
        System.out.println(+num[7]);
        System.out.println(+num[8]);
        System.out.println(+num[9]);
        System.out.println(+num[10]);
        System.out.println(+num[11]);
        System.out.println(+num[12]);
        System.out.println(+num[13]);
        System.out.println(+num[14]);
     }
    else
    {
        System.out.println("Data input is invalid. Enter a number between "
                +
                "1 and 1000.");
        break;
    }
    }

    BubbleSort (num);
    for (int i=0; i < num.length; i++)
    {
        System.out.println("The sorted numbers are: ");
        System.out.print(num[i]+ " ");
    }

}

private static void BubbleSort(int[] num)
{
    for (int i=0; i <= num.length; i++)
        for (int x=1; x <= num.length; x++)
            if (num[x] > num[x+1])
            {
                int temp = num[x];
                num[x] = num[x+1];
                num[x+1] = temp;
            }

}

}

推荐答案

尝试此冒泡排序：

private static void BubbleSort(int[] num) {
 for (int i = 0; i < num.length; i++) {
    for (int x = 1; x < num.length - i; x++) {
        if (num[x - 1] > num[x]) {
            int temp = num[x - 1];
            num[x - 1] = num[x];
            num[x] = temp;

        }
    }
  }
}

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