Question

I have file TestClass.java

package com.fido.android.sample.dsm.SoftPin.Core;

public class TestClass
{
   public int mValue1;
   public String mValue2;
}

Now in this file (TestClass.java) I want to declare one more class, but when I write for example:

public class SecondClass
{
    // Class members goes here.
}

Compiler do not allow me to do that, if I remove public everything is Okay, but I can use SecondClass only in the TestClass.java, I can’t write

SecondClass sc = new SecondClass();

out of TestClass.java class. Now I want to know if there is a way to do such thing, to have two classes in the same file and to use them from everywhere (not inner classes).

Answer 1

Question is: Why would you want to declare a second public class within the same Java class file? It is a rule in Java that each public class must be declared in a single class file – except for nested classes like Graham Borland pointed out.