找不到符号println

Question

我今天刚刚开始一个新的java项目,我遇到了println的问题.这是我的主要方法:

public static void main(String[] args) {
    String stringNumGuards = JOptionPane.showInputDialog("How any guards do you have?");
    int numGuards = Integer.parseInt(stringNumGuards);
    Controller headGuard = new Controller();
    System.out.println("You have ", numGuards, " guards");
} //main

javac输出

Controller.java:10: cannot find symbol
symbol  : method println(java.lang.String,int,java.lang.String)
location: class java.io.PrintStream
        System.out.println("You have ", numGuards, " guards");

我做错了什么？我之前从未遇到过println的问题.

Answer 1

你+没有连接字符串,

System.out.println("You have ", numGuards, " guards");

应该成为

System.out.println("You have " + numGuards + " guards");