冒泡排序:相邻两个元素比较，
public static void main(String[] args)
{
int[] arr={57,23,19,89,66,74};
for(int x=0; x<arr.length-1; x++)
{
for(int y=0; y<arr.length-1-x; y++)
{
if(arr[y]>arr[y+1])
{
int temp = arr[y];
arr[y] = arr[y+1];
arr[y+1] = temp;
swap(arr,y,y+1);
}
}
}
for(int x=0; x<arr.length-1; x++)
{
System.out.println(arr[x]);
}
}
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