java: Arrays sort

发布时间 2023-03-25 15:53:38作者: ®Geovin Du Dream Park™

 

package Dal;


/**
 *整数数组
 * @author geovindu
 * @version  1.0
 */
public class NumberAssociative {


    /**
     *只显示数组
     * @param arr 输入数组 整数数组
     * @return 返回 要显示的整数数组
     */
    public int [] getNumberDisplay(int [] arr)
    {
        //int [] arr=new int[]{1,3,9,5,6,7,1,5,4,8};
        //int [] sort=new int[arr.length];
        int[] duArrList;
        if(arr.length>0) {
            duArrList = new int[arr.length];
            for (int i = 0; i <= arr.length - 1; i++) {
                duArrList[i] = arr[i];
            }

            return  duArrList;
        }
        else
        {
            duArrList = new int[1];
            return duArrList;
        }

    }

    /**
     * 从大到小
     * @param arr  输入数组 整数数组
     * @return 返回 要显示的整数数组
     */
    public int [] getNumberDesc(int [] arr)
    {
        //int [] arr=new int[]{1,3,9,5,6,7,1,5,4,8};
       // int [] sort=new int[arr.length];
        int[] duArrList;

        if(arr.length>0)
        {
            duArrList = new int[arr.length];
            for (int i = 0; i <= arr.length - 1; i++) {
                duArrList[i] = arr[i];
            }
            int temp = Integer.MAX_VALUE;
            for (int i = 0; i < duArrList.length - 1; i++) {
                for (int j = 0; j < duArrList.length - 1 - i; j++) {
                    if (duArrList[j] < duArrList[j + 1]) {
                        temp = duArrList[j];
                        duArrList[j] = duArrList[j + 1];
                        duArrList[j + 1] = temp;
                    }

                }
            }
            return  duArrList;
        }
        else
        {
            duArrList = new int[1];
            return duArrList;
        }

    }

    /**
     * 从小到大
     * @param arr  输入数组 整数数组
     * @return 返回 要显示的整数数组
     */
    public int [] getNumberAsc(int [] arr)
    {
        int[] duArrList;
        Boolean flag=false;
        if(arr.length>0)
        {
            duArrList = new int[arr.length];
            for (int i = 0; i <= arr.length - 1; i++) {
                duArrList[i] = arr[i];
            }
            int temp = Integer.MIN_VALUE;
            for (int i = 0; i < duArrList.length - 1; i++) {
                for (int j = 0; j < duArrList.length - 1 - i; j++) {
                    if (duArrList[j] > duArrList[j + 1]) {
                        temp = duArrList[j];
                        duArrList[j] = duArrList[j + 1];
                        duArrList[j + 1] = temp;
                        flag=true;
                    }

                }
                if(!flag) {
                    break;
                }
            }
            return  duArrList;
        }
        else
        {
            duArrList = new int[1];
            return duArrList;
        }

    }
}


package Bll;

import  Dal.NumberAssociative;

import java.lang.reflect.Array;
import java.util.Arrays;

/**
 *整数数组
 * @author geovindu
 * @version  1.0
 */
public class NumberAssociativeBll {

    /**
     *只显示数组
     */
    public void getNumberDisplay()
    {
        NumberAssociative numberAssociative=new NumberAssociative();
        int [] arr=new int[]{1,3,9,5,6,7,13,15,4,8};
        int[] display=numberAssociative.getNumberDisplay(arr);
        System.out.println(Arrays.toString(display));

    }

    /**
     *从大到小
     */
    public void getNumberDesc()
    {
        NumberAssociative numberAssociative=new NumberAssociative();
        int [] arr=new int[]{1,3,9,5,6,7,13,15,4,8};
        int[] display=numberAssociative.getNumberDesc(arr);
        System.out.println(Arrays.toString(display));

    }

    /**
     *从小到大
     */
    public void getNumberAsc()
    {
        NumberAssociative numberAssociative=new NumberAssociative();
        int [] arr=new int[]{1,33,49,5,6,7,13,15,4};
        int[] display=numberAssociative.getNumberAsc(arr);
        System.out.println(Arrays.toString(display));

    }
}

  

调用:

        //整数数组排序
        NumberAssociativeBll numberAssociativeBll=new NumberAssociativeBll();
        numberAssociativeBll.getNumberDisplay();
        numberAssociativeBll.getNumberAsc();
        numberAssociativeBll.getNumberDesc();

  

输出

[1, 3, 9, 5, 6, 7, 13, 15, 4, 8]
[1, 4, 5, 6, 7, 13, 15, 33, 49]
[15, 13, 9, 8, 7, 6, 5, 4, 3, 1]