【开发者笔记】插入排序过程呈现之java内置GUI表示

先给代码，再给过程视频：

 package com.dyi.wyb.sort; import java.awt.Color;
 import java.awt.Graphics;
 import java.util.Random; import javax.swing.*; public class InsertionSort extends JFrame {
     /**
      *
      */
     private static final long serialVersionUID = 1L;
     /**
      * main method
      *
      * @param args
      *            []
      * @author stagebo
      */
     static int[] arr = getArray(1000);
     static InsertionSort show;
     public static void main(String[] args) {
         show=new InsertionSort("插入排序");
         insertionSort(arr);
     }     /**
      * introduction:algorithms of insertionSort
      *
      * @param arr
      *            []
      * @return void
      *
      */
     public static void insertionSort(int[] arr) {
         for (int j = 1; j < arr.length; j++) {
             int key = arr[j];
             int i;
             for (i = j - 1; i >= 0 && arr[i] > key; i--) {
                 arr[i + 1] = arr[i];
                 try{Thread.sleep(5);}catch(Exception e){}
                 show.repaint();
             }
             arr[i + 1] = key;
         }
     }     /**
      * function: print array
      *
      * @param arr
      * @param str
      */
     public static void printArray(int[] arr, String str) {
         System.out.print(str + ":");
         for (int i : arr) {
             System.out.print(i + "--");
         }
         System.out.println();
     }     /**
      * constructor,initial the panel
      */
     public InsertionSort(String title) {
         setTitle(title);
         setLocation(20, 20);
         setSize(1000, 600);
         setVisible(true);
         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     }     public void paint(Graphics g) {
         for (int i = 0; i < arr.length; i++) {
             g.setColor(Color.BLACK);
             g.drawLine(i, 600, i, 600-arr[i]);
             g.setColor(Color.WHITE);
             g.drawLine(i, 0,i, 600-arr[i]);
         }
     }     /**
      * return a random value array
      *
      * @param length
      * @return array[length]
      */
     public static int[] getArray(int length) {
         int[] re = new int[length];
         for (int i = 0; i < re.length; i++)
             re[i] = i / 2;
         for (int i = 0; i < re.length; i++) {
             int index1 = new Random().nextInt(length);
             for (int j = 0; j < 3; j++) {
                 int temp = re[i];
                 re[i] = re[index1];
                 re[index1] = temp;
             }
         }
         return re;
     }
 }

插入排序以及显示面板代码

插图，插入排序过程显示视频连接

插入排序的时间复杂度T(n)=O(n₂),和冒泡排序半斤八两。