W3School TIY Editor

public class Main { public static void main(String[] args) { char[] myStr1 = {'H', 'e', 'l', 'l', 'o'}; String myStr2 = ""; myStr2 = myStr2.copyValueOf(myStr1, 0, 5); System.out.println("被返回的字符串：" + myStr2); } }