java四种数组排序

int a[]={49,38,65,97,76,13,27,49,78,34,12,64,5,4,62,99,18,23,34,15,35,25,53,51};  
    int temp=0;  
        for (int i = 0; i < a.length - 1; i++)
        {
            for (int j = 0; j < a.length - 1 - i; j++)
            {
                if (a[j] > a[j + 1])
                {
                    temp = a[j];
                    a[j] = a[j + 1];
                    a[j + 1] = temp;
                }
            }
        }

int a[]={49,38,65,97,76,13,27,49,78,34,12,64,5,4,62,99,18,23,34,15,35,25,53,51};  
   for(int i=0;i<a.length;i++){
       for(int j=i+1;j<a.length;j++){
           if(a[i]>a[j]){
               int temp=a[i];
               a[i]=a[j];
               a[j]=temp;
           }
       }
   }

int a[]={49,38,65,97,76,13,27,49,78,34,12,64,5,4,62,99,18,23,34,15,35,25,53,51};  
     for (int i = 1; i < a.length; i++)
        {
            for (int j = i; j > 0; j--)
            {
                if (a[j] < a[j - 1])
                {
                    int temp = a[j - 1];
                    a[j - 1] = a[j];
                    a[j] = temp;
                }
                else
                    break;
            }
        }