基本的几种排序

来源：互联网发布：自学编程能找到工作吗编辑：程序博客网时间：2024/05/16 11:22

package sorttest;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class BasicSort {

public static void selectionSort(int[] number) {
  for (int i = 0; i < number.length - 1; i++) {
   int m = i;
   for (int j = i + 1; j < number.length; j++)
    if (number[j] < number[m])
     m = j;
       if (i != m)
        swap(number, i, m);
  }

}

public static void injectionSort(int[] number) {
  for (int j = 1; j < number.length; j++) {
   int tmp = number[j];
   int i = j - 1;
   while (tmp < number[i]) {
    number[i + 1] = number[i];
    i--;
    if (i == -1)
     break;
   }
   number[i + 1] = tmp;
  }
}

public static void bubbleSort(int[] number) {
  boolean flag = true;
  for (int i = 0; i < number.length - 1 && flag; i++) {
   flag = false;
   for (int j = 0; j < number.length - i - 1; j++) {
    if (number[j + 1] < number[j]) {
     swap(number, j + 1, j);
     flag = true;
    }
   }
  }
}

private static void swap(int[] number, int i, int j) {
  int t;
  t = number[i];
  number[i] = number[j];
  number[j] = t;
}

public static void main(String[] args){

//  int[] arrayint=new int[10];
//  int i;
//  System.out.println("输入：10 个数字");
//  for(i=0;i<arrayint.length;i++){
//   BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
//      try {
//      if(br.readLine()!=null)
//    arrayint[i]=Integer.parseInt(br.readLine());
//      if(i==arrayint.length-1){
//        System.out.println("输入停止");
//      }
//   } catch (NumberFormatException e) {
//    // TODO Auto-generated catch block
//    e.printStackTrace();
//   } catch (IOException e) {
//    // TODO Auto-generated catch block
//    e.printStackTrace();
//   }
//  }
//
  int[] arrayint={1,5,3,4,2,15,10,5,20,11};
  selectionSort(arrayint);
  //injectionSort(arrayint);
  for(int j=0;j<arrayint.length;j++){
   System.out.print(arrayint[j]+"|");
  }

}
}