Java递归算法——二分查找

import java.lang.reflect.Array;
import java.nio.Buffer;
import java.util.Arrays;
import java.util.Random;

//=================================================
// File Name       :	RecFind
//------------------------------------------------------------------------------
// Author          :	Common

//类名：BinarySearch_Find
//属性：
//方法：
class Rec_Find{
private int[] temp;
private int searchKey;
//private int lowerBound = 0;			//下界
//private int upperBound ;				//上界
private int nElement;

public int[] getTemp() {
return temp;
}

public void setTemp(int[] temp) {
this.temp = temp;
}

public Rec_Find(int[] temp) {//构造函数
this.temp = temp;
//this.upperBound = temp.length-1;
}

public int find(int searchKey,int lowerBound,int upperBound){
int curNum;
this.searchKey = searchKey;
curNum = (lowerBound+upperBound)/2;
if(temp[curNum]==this.searchKey){
return curNum;							//find
}
else if(lowerBound>upperBound){
return -1;										//没有find
}
else{
if(temp[curNum]<this.searchKey){
return find(searchKey,curNum+1,upperBound);
}
else{
return find(searchKey,lowerBound,curNum-1);
}
}

}

}

//类名：RandomArrays
//属性：
//方法：
class RandomArray{					//生成随机数组，有Num个

private int[] Arrays;

public int[] getArrays(int Num){
//		int[] Arrays = new int[Num];
Arrays = new int[Num];
Random r = new Random();

for(int i=0;i<Num;i++){
Arrays[i] = r.nextInt(1000);
//			System.out.print(Arrays[i]+"、");
}
return Arrays;
}
}

//类名：OrderedArrays
//属性：
//方法：
class OrderedArray{					//生成有序数组，从0开始到Num

public int[] getArrays(int Num){
int[] Arrays = new int[Num];

for(int i=0;i<Num;i++){
Arrays[i] = i;
//			System.out.print(Arrays[i]+"、");
}
return Arrays;
}
}

//主类
//Function        : 	RecFind
public class RecFind {

public static void main(String[] args) {
// TODO 自动生成的方法存根

//		RandomArrays array_demo = new RandomArrays();
//		BinarySearch_Find arrays = new BinarySearch_Find(array_demo.getArrays(100));

OrderedArray array_demo = new OrderedArray();
Rec_Find arrays = new Rec_Find(array_demo.getArrays(100));
System.out.println(Arrays.toString(arrays.getTemp()));
System.out.println(arrays.find(55,0,100));
}

}