JAVA 二分法

public boolean c(){
		int[] b={1,4,5,3,6};
		Arrays.sort(b);
		int target=3;
		boolean result=false;
		int min=0;
		int max=b.length-1;
		while(min<=max){
			int num = (min+max)/2;
			if(target>b[num]){
				min=num+1;
			}
			if(target<b[num]){
				max=num-1;
			}
			if(target==b[num]){
				return true;
			}
		}
		return result;
 	}