Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Open Source License 

import java.io.File;
import java.net.URLDecoder;
import java.security.CodeSource;

public class Main {
    /**
     * Returns the folder that contains a jar that contains the class
     *
     * @param aclass a class to find a jar
     * @return
     */
    public static String getJarContainingFolderPath(Class aclass) throws Exception {
        CodeSource codeSource = aclass.getProtectionDomain().getCodeSource();

        File jarFile;

        if (codeSource.getLocation() != null) {
            jarFile = new File(codeSource.getLocation().toURI());
        } else {
            String path = aclass.getResource(aclass.getSimpleName() + ".class").getPath();

            int startIndex = path.indexOf(":") + 1;
            int endIndex = path.indexOf("!");
            if (startIndex == -1 || endIndex == -1) {
                throw new IllegalStateException(
                        "Class " + aclass.getSimpleName() + " is located not within a jar: " + path);
            }
            String jarFilePath = path.substring(startIndex, endIndex);
            jarFilePath = URLDecoder.decode(jarFilePath, "UTF-8");
            jarFile = new File(jarFilePath);
        }
        return jarFile.getParentFile().getAbsolutePath();
    }
}