为什么输入a也是显示flase

Question

1 package Exercises ;

2 import java . util.Scanner;

Exercise 3 [Java 1

3 public class Exercise_ 3 f

Please input a letter

49

public static void main(String[] args)f

5

System. out. println("Please input a letter");

flase

6

Scanner sc = new Scanner(System. in);

7

String n = sc.next( );

8

if(n=="a" n=="e"ln=="i"]ln=="o"lln=="u")

9

System. out. println("ture");

0

else

System. out . println("flase");

2

]]

3

4

Answer 1

因为双引号的话，它就把"a"这个当成字符串了
str字符串没法直接比较，自然就是false了

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