java - 在java中连接字符以形成String

Question

有没有办法在 Java 中将 char 连接成一个 String？

例子:

String str;
Char a, b, c;
a = 'i';
b = 'c';
c = 'e';

str = a + b + c; // thus str = "ice";

Answer 1

使用StringBuilder:

String str;
Char a, b, c;
a = 'i';
b = 'c';
c = 'e';

StringBuilder sb = new StringBuilder();
sb.append(a);
sb.append(b);
sb.append(c);
str = sb.toString();

一行:

new StringBuilder().append(a).append(b).append(c).toString();

执行 ""+a+b+c 得到:

new StringBuilder().append("").append(a).append(b).append(c).toString();

我前段时间问过related question .