The Arrays. BinarySearch cannot find the string?-CodePudding

 public class BinarySearchTest {

Public static String [] deviceIds={
"44: EF: BF: f: 84:0 e", 
"38:01: be F: F7:18", 
"CC: 79: CF: A7:8 b: 15", 
"6 c: 21: A2: E1: E6:5 d", 
"6 c: 21: A2: E1: E6:82", 
"6 c: 21: A2: E1: D9: C9", 
"6 c: 21: A2: E1, E0:11"}; 
Public static void main (String [] args) {

For (String deviceId: deviceIds) {
System. The out. Println (" binarySearch: "+ Arrays. BinarySearch (deviceIds, deviceId)); 
} 
} 

}

Output:
Task: JavaTest: BinarySearchTest. The main ()
3
binarySearch: -BinarySearch: 1
8
binarySearch: -BinarySearch: 3
8
binarySearch: -3
binarySearch: -3
binarySearch: -

CodePudding user response:

Arrays. BinarySearch () use is the premise of array is ordered,