bbsort

 public class 十六 {public  int bubbleSort(int[] num) {
    for (int i = 0; i < num.length; i++) {
        boolean swapFlag = false;
        for (int j = 0; j < num.length - i - 1; j++) {
            if (num[j] > num[j + 1]) {
                int tmp = num[j];
                num[j] = num[j + 1];
                num[j + 1] = tmp;
                swapFlag = true;
            }
        }
        if (!swapFlag) {
            System.out.println("right");
            break;
        }
    }
    return -1;
}
 public static void main(String[] args)
        {
            十六 homeWork=new 十六();
            int[] num1={2,3,3,2,1};
            int[] num2={12,3,3,12,2};
            System.out.println(homeWork.bubbleSort(num1));}}

binarySreach

public class 十六 {ublic int binarySearch(int[] num,int toFind){
     return binarySearchInternal(num,toFind,0,num.length-1);
}
public int binarySearchInternal(int[] num,int toFind,int left,int right)
{
    if (left>right){
        return -1;
    }
    int mid=(left+right)>>1;
    if (num[mid]==toFind)return mid;
    else if (toFind<num[mid]){
        return binarySearchInternal(num, toFind, left, mid-1);
    }else {
        return binarySearchInternal(num, toFind, mid+1, right);
    }
    
}
 public static void main(String[] args)
        {
            十六 homeWork=new 十六();
            int[] num1={2,3,3,2,1};
            int[] num2={12,3,3,12,2};
            System.out.println(homeWork.binarySearchInternal(num1,3,1,3));}}

pack

`class Car{
    String engine;
    String lunzi;
    String fangxiangpan;
    String anjian;
}
public class 十十八
{
    public static void main(String[] args)
    {
        Car car=new Car();
        car.anjian="di";
        car.engine="fire";
        car.fangxiangpan="roll";
        car.lunzi="go";
    }

}
`