throw new IllegalStateException("Console is not available!");
}
return console.readLine(prompt);
}
}
Console类还有个特色就是，专门对密码(输入无回显)等安全字符，进行了处理。专门提供 readPassword()方法,具体应用见如下代码：
public class TestConsole5 { public static void main(String[] args) { Console console = System.console(); if (console == null) { throw new IllegalStateException("Console is not available!"); } while(true){ String username = console.readLine("Username: "); char[] password = console.readPassword("Password: "); if (username.equals("Chris") && String.valueOf(password).equals("GoHead")) { console.printf("Welcome to Java Application %1$s.\n", username); // 使用后应立即将数组清空，以减少其在内存中占用的时间，增强安全性 password = null; System.exit(-1); } else { console.printf("Invalid username or password.\n"); } } } }
摘自 qiaoning13256的专栏