Java Is File Newer isNewer(String file, String reference)

Description

is Newer

License

Open Source License

Declaration

public static boolean isNewer(String file, String reference) 

Method Source Code

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

import java.io.File;

public class Main {
    public static boolean isNewer(String file, String reference) {
        return isNewer(new File(file), new File(reference));
    }//from w w  w.j a  v  a  2 s  .c  o m

    /**
     * PerformTest if specified <code>File</code> is newer than the reference
     * <code>File</code>.
     * 
     * @param file
     *            the <code>File</code> of which the modification date must be
     *            compared
     * @param reference
     *            the <code>File</code> of which the modification date is used
     * @return <code>true</code> if the <code>File</code> exists and has been
     *         modified more recently than the reference <code>File</code>.
     */
    public static boolean isNewer(File file, File reference) {
        if (reference.exists() == false) {
            throw new IllegalArgumentException("The reference file '" + file + "' doesn't exist");
        }
        return isNewer(file, reference.lastModified());
    }

    /**
     * Tests if the specified <code>File</code> is newer than the specified time
     * reference.
     * 
     * @param file
     *            the <code>File</code> of which the modification date must be
     *            compared.
     * @param timeMillis
     *            the time reference measured in milliseconds since the epoch
     *            (00:00:00 GMT, January 1, 1970)
     * @return <code>true</code> if the <code>File</code> exists and has been
     *         modified after the given time reference.
     */
    public static boolean isNewer(File file, long timeMillis) {
        if (!file.exists()) {
            return false;
        }
        return file.lastModified() > timeMillis;
    }

    public static boolean isNewer(String file, long timeMillis) {
        return isNewer(new File(file), timeMillis);
    }
}

Related

1. isNewer(File file, File reference)
2. isNewer(File file1, File file2)
3. isNewerOrEqual(String newFile, String oldFile)