Trouble in compiling the java code

Question

I wrote the following piece of code in sublime text on my macbook pro. I saved the file inside the java folder on my desktop. When I tried to compile the program and tried to execute it, I am getting the fallowing error message " Error: Could not find or load main class Animals ". Could someone help me in compiling and running this program

package forest;
class Animals{

    public static void main(String[] args)
    {
        Animals s = new Animals();
        Sring[] s2 = s.getAllAnimals();

    }

    public String[] getAllAnimals()
    {
        String[] s1= {"Lion", "Elephant", "Tiger","Deer","Wolf","Dinosar"};
        return s1;
    }
}

Answer 1

将您的类Animal设为public，并将该文件重命名为Animal.java

Answer 2

1. Your class is in a package called forest so you need to move Animals.java into a directory called forest .

2. You hava a typo on line 7: Sring[] s2 = should be String[] s2 = .

3. Compile from the parent directory of forest . Something like this should work

    $ javac forest/Animals.java 

4. Run from the parent dir:

    $ java forest.Aminals 

Your program will have no output when you run it.

Answer 3

Look on your code there is no sring type class in java so change it to String

 Sring[] s2 = s.getAllAnimals();
    change it to 
     String[] s2 = s.getAllAnimals();

Everything will be good

Answer 4

First of all you can name your java file with any name. Say Sample.java. and let us consider this file is present in D:\\work

Go to D:\\work folder in cmd prompt.

Keep this in mind :

If you write package forest, then your class has to be public. So write public class Animals{}

While compiling do this javac -d Sample.java By doing this the compiler will create the folder "forest" and inside that it will create the Animals.class. So now in D:\\work we have Sample.java file and "forest" folder

Now in your command prompt DO NOT go inside the "forest" folder. Stay in work folder. D:\\work

And Run this command from D:\\work java forest.Animals

Explantion::

The name of your class that contains Main method is not Animals. It is forest.Animals This is the fully qualified name of the class. This happened becasue you put a package to it. So while runnning you must run with fully qualified name

 java forest.Animals

The name of your class is not Sample.java. <-- This is just a text file name it anything the complier will not generate a class with name Sample.class because inside this file there is no such class, the class name is Animals. So Animals.class will be generated.

And javac -d Sample.java helps you create the folder structure automatically based on the package.

For example if your class was like this

package com.stackoverflow.samples
public class Animals{
}

And you do java -d Sample.java

The Compiler will create a folder com inside that another folder stackoverflow inside that another folder samples and inside that a file Animals.class

To run this you must run it from outside the the "com" folder with fully qualified name

java com.stackoverflow.samples.Animals

Answer 5

尝试本教程Java和Mac OS X终端并public您的类，并确保包含源代码的文件名和main class的名称相同，您的主类是包含main方法的类。