for (char[] pass : passwords)
其中passwords声明方式是:
private Set <char[]> passwords = new HashSet <char[]> ();
请高手指点 for (char[] pass : passwords)的意思
其中passwords声明方式是:
private Set <char[]> passwords = new HashSet <char[]> ();
请高手指点 for (char[] pass : passwords)的意思
提示错误:语法错误,仅当源级别为 5.0 时“for each”语句才可用这是怎么回事啊?
源级别是什么?