我可以找出Java程序是使用java还是javaw启动的 [英] Can I find out if the java program was launched using java or javaw

问题描述

这是与其他用户之前的一个问题相关的，要求如何检测该代码是否在eclipse IDE中运行

This is related to an earlier question by a different user, asking How to detect that code is running inside eclipse IDE.

我注意到Eclipse始终使用 javaw 而不是 java 。 （这并不意味着使用 javaw 从Eclipse启动的程序）。

I noticed that Eclipse always launches programs with javaw rather than java. (This does not imply a program launched with javaw was launched from Eclipse).

我可以找到传递的参数使用

I can find the arguments passed using

RuntimeMXBean RuntimemxBean = ManagementFactory.getRuntimeMXBean();
List<String> lst = RuntimemxBean.getInputArguments();
for (int i = 0; i < lst.size(); i++)
    System.out.println(lst.get(i));

但这并不告诉我是否使用 java 或 javaw 。

But this does not tell me whether it was launched using java or javaw.

1. 有没有办法找出是否使用 java 或 javaw ？


2. 为什么Eclipse使用 javaw 启动程序？ li>
   

1. Is there any way to find it out whether it was launched using java or javaw?
2. Why does Eclipse use javaw to launch programs?

推荐答案

System.console（）将返回 null ，因为唯一的区别在于使用 java 和 javaw 是 javaw 没有关联的控制台窗口。

System.console() will return null, since the only difference between using java and javaw is that for javaw, there is no associated console window.

这是一个小型测试程序，您可以用来演示：

Here's a small test program you can use to demonstrate that:

import javax.swing.JOptionPane;
public class ConsoleTest {
    public static void main(String[] args) {
        if (System.console() == null) {
            JOptionPane.showMessageDialog(null, "System.console() is null");
        } else {
           JOptionPane.showMessageDialog(null, "System.console() is not null");
        }
    }
}

但是，从内部运行Eclipse， System.console（）仍然返回 null ，即使以 java 。

However, when running from within Eclipse, System.console() will still return null, even when started with java.

在Eclipse的启动配置JRE选项卡中，如果将运行时JRE更改为替代JRE ，则可以将Java可执行文件从 javaw 更改为 java 。

In Eclipse's launch configuration, JRE tab, if you change the Runtime JRE to Alternate JRE, you can then change the Java executable from javaw to java.

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