我不明白为什么使用Unicode表示字符时,如果使用indexOf方法就无法得到正确的结果?
public class Test {
public static void main(String[] args) {
String strg = "Dog?Cat";
System.out.println("String: " + strg);
System.out.println("Char: " + strg.indexOf('?'));
System.out.println("String: " + strg.indexOf(new String("?")));
System.out.println("Sign: " + String.valueOf('\u0134'));
System.out.println("Unicode: " + strg.indexOf(String.valueOf('\u0134')));
}
}
结果:
String: Dog?Cat
Char: 3
String: 3
Sign: ?
Unicode: -1 --> Why is it -1 ?! Why not 3 ?
你能帮我吗?谢谢!