来自 netbeans 的 .jar 将无法在控制台中打开

Question

在 netbeans 中构建了一个简单的 java 程序，build/compiled 它并在项目目录中为我生成了一个 .jar。

以下是我的src代码：

    import java.util.Scanner;

public class Welcome {
    public static void main(String[] args){

        System.out.println("Welcome to Java");
        Scanner input = new Scanner(System.in);

    }

}

我希望能够在控制台中打开它以使用扫描仪功能，但我似乎无法打开 jar。

我尝试使用以下命令从命令行打开它：

java -jar "C:\Users\Nick\Documents\NetBeansProjects\JavaApplication1\dist\JavaApplication1.jar"

但是没有骰子。双击 .jar 也打不开。

有什么想法吗？

此致

Answer 1

如果您想使用 -jar

启动它，您需要将其构建为运行nable jar

见https://docs.oracle.com/javase/tutorial/deployment/jar/run.html

You can run JAR packaged applications with the Java launcher (java command). The basic command is:

java -jar jar-file

The -jar flag tells the launcher that the application is packaged in the JAR file format. You can only specify one JAR file, which must contain all of the application-specific code.

Before you execute this command, make sure that the runtime environment has information about which class within the JAR file is the application's entry point.

To indicate which class is the application's entry point, you must add a Main-Class header to the JAR file's manifest. The header takes the form:

Main-Class: classname

The header's value, classname, is the name of the class that is the application's entry point.

另一种方法是运行通过指定 class 路径和主要 class

使用它

java -cp "C:\Users\Nick\Documents\NetBeansProjects\JavaApplication1\dist\JavaApplication1.jar" Welcome

来自 netbeans 的 .jar 将无法在控制台中打开

.jar from netbeans will not open in console

java

console

netbeans

jar