CheckVersion.java Source code

Introduction

Here is the source code for CheckVersion.java

Source

//: com:bruceeckel:tools:CheckVersion.java
// {RunByHand}
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.

public class CheckVersion {
    public static void main(String[] args) {
        String version = System.getProperty("java.version");
        char minor = version.charAt(2);
        char point = version.charAt(4);
        if (minor < '4' || point < '1')
            throw new RuntimeException("JDK 1.4.1 or higher " + "is required to run the examples in this book.");
        System.out.println("JDK version " + version + " found");
    }
} ///:~