int data [] = new int [] {1,5,6,2,3,4,9,8,7,10};
java.util.Arrays.sort(data); //需要先進行排序
System.out.println(Arrays.binarySearch(data,9)); //傳回8，大于0代表查找到了 int data [] = new int [] {1,5,6,2,3,4,9,8,7,10};
java.util.Arrays.sort(data); //需要先進行排序
System.out.println(Arrays.binarySearch(data,9)); //傳回8，大于0代表查找到了