MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.io.IOException;

public class MainClass {
    public static void main(String args[]) throws IOException {
        System.setSecurityManager(new MySecurityManager());
    }
}

class MySecurityManager extends SecurityManager {
    public void checkRead(String file) {
        if (!(file.endsWith(".txt")) && !(file.endsWith(".java")) && !(file.endsWith(".class"))
                && !(file.startsWith("C:\\"))) {
            throw new SecurityException("No Read Permission for : " + file);
        }
    }
}