在java中将单个字符附加到字符串或char数组中？

Question

是否可以在java中将单个字符附加到数组或字符串的末尾

例如:

    private static void /*methodName*/ () {            
          String character = "a"
          String otherString = "helen";
          //this is where i need help, i would like to make the otherString become 
         // helena, is there a way to do this?               
      }

Answer 1

1. String otherString = "helen" + character;

2. otherString +=  character;

Answer 2

您将要使用静态方法Character.toString（char c）首先将字符转换为字符串。然后，您可以使用普通的字符串连接功能。

Answer 3

new StringBuilder().append(str.charAt(0))
                   .append(str.charAt(10))
                   .append(str.charAt(20))
                   .append(str.charAt(30))
                   .toString();

这样你就可以获得你想要的任何字符的新字符串.