类路径似乎正确，但JVM仍然找不到或加载主类 [英] Classpath seems correct but JVM still could not find or load main class

问题描述

我对编程和java比较陌生，我试图学习如何从命令行创建一个用户定义的包。我得到以下：错误：找不到或加载主类TestPhone 。我已查看有关此类错误的帖子，包括评论效果好的帖子， java ，期望类的完全限定名， mobile.TestPhone 。 ../ mobile 目录不需要在类路径中。

I am relatively new to programming and java and am trying to learn how to create a user-defined package from the command-line. I get the following: Error: Could not find or load main class TestPhone. I've reviewed posts on this type of error including the well-commented post here. The post lists 4 steps that the JVM goes through to run a java program:

1. Search for the compiled version of the class.
2. Load the class.
3. Check that the class has a main method with signature static void main(String[]).
4. Call that method passing it the command line arguments as a String[].

Apparently, my JVM can't find my TestPhone.class for some reason I am yet to figure out. Here's my directory structure:

My classpath is set as follows:

My classes contain simple codes from Mala Gupta to test accessibility of class variables:

package mobile;
class Phone {
    static boolean softKeyboard = true;
}


package mobile;
class TestPhone {
    public static void main (String[] args) {
        Phone.softKeyboard = false;

        Phone p1 = new Phone();
        Phone p2 = new Phone();

        System.out.println(p1.softKeyboard);
        System.out.println(p2.softKeyboard);

        p1.softKeyboard = true;

        System.out.println(p1.softKeyboard);
        System.out.println(p2.softKeyboard);
    }
}

Any idea why it doesn't find my classes? Many thanks.

System specs: Java version 1.8.0 Javac 1.8.0 Win 7 on 32-bit OS

解决方案

The java application launcher, java, expects the fully qualified name of the class, mobile.TestPhone. The ../mobile directory need not be in the classpath.

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