JAVA基础练习程序 数组冒泡排序

/*

数组排序

*/

public class BubbleSort {

public static void main(String[] args){

int[] arr = {1,25,36,21,24,12,39,87};

System.out.println("排序前：");

String str = array2string(arr);

System.out.println(str);

bubblesort(arr);

System.out.println("排序后：");

String str2 = array2string(arr);

System.out.println(str2);

}

/*冒泡排序*/

public static void bubblesort(int[] arr){

for(int x=0;x

for(int y=0;y

if(arr[y] > arr[y+1]){

swap(arr,y,y+1);

}

}

}

}

//定义数组元素之间位置交换

public static void swap(int[] arr,int index1,int index2){ //定义临时变量

int temp = arr[index1];

arr[index1] = arr[index2];

arr[index2] = temp;

}

//定义字符串打印

public static String array2string(int[] arr){

String str = "";

for(int x=0;x

if(x != arr.length-1){

str = str + arr[x] + ",";

1

} else {

str = str + arr[x];

}

}

return str;

}

}

2