Question

所以每当我构建和测试我的maven包时，我都没有得到输出并且程序自动关闭，我在Eclipse和Netbeans上尝试了这个并且仍然没有注意，提前感谢并且代码如下：

public static void main(String[] args) {
    // TODO Auto-generated method stub

    Boolean end = false;
    while(end = false){
    System.out.println("Enter your command(for list of commands press h): ");
    Scanner scanner = new Scanner(System.in);
    String command = scanner.nextLine();
    if(command == "h"){
        System.out.println("start   starts basic program");
        System.out.println("start1  starts twitter based program(in development)");
        System.out.println("api     sets api");
        System.out.println("time     sets check time");

    }else if( command == "start"){
        mainmethod();
    }else if(command == "time"){

    }else if( command == "end"){
                end = true;
            }
    }


}

Answer 1

您的代码意味着：

// prepare and bind
  $sql="INSERT INTO creatcontact (email, subject, mobileno) VALUES (?,?,?)";
  $stmt = $conn->prepare($sql);
  $stmt->bind_param("ssi",$email, $subject, $mobileno);
  $stmt->execute();
//redirect code
 header('Location: index.php');
  $stmt->close();
  $conn->close();

请改变：

while(false){.....}

进入：

while(end = false){
......
}

Answer 2

它是“==”而不是“=”。end == false

在maven上没有输出到println的控制台

2 个答案: