Re: Build error java.lang.IllegalArgumentException: Negative time, at java.io.File.setLastModified(File.java:1344)

[Rakhunathan <mr...@gmail.com>]

Not really sure why the problem occurs, but found out the solution. The
error occurs because, one or more file that you are trying to build, has a
negative time.(file.getLastModified() returns a negative value). If its a
huge project, might be hard to track which of them has gone wrong. Below
code might help

package com.example;

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

public class ModifyAll {
    public static void main(String[] args) throws IOException {
        List<File> folderList = new ArrayList<>();
        List<File> fileList = new ArrayList<>();

        File folder = new File("D:/Rakhu/Copy/projectfolder/src");
        FileVO baseFileVO = segregateFiles(folder);
        fileList.addAll(baseFileVO.getFileList());
        folderList.addAll(baseFileVO.getFolderList());

        for (int i = 0; i < folderList.size(); i++) {
            FileVO thisVO = segregateFiles(folderList.get(i));
            fileList.addAll(thisVO.getFileList());
            folderList.addAll(thisVO.getFolderList());
        }

        for (int i = 0; i < fileList.size(); i++) {
            Date dte = new Date();
            long milliSeconds = dte.getTime();
            System.out.println("Setting Time For " + fileList.get(i) + " as
" + milliSeconds);
            fileList.get(i).setLastModified(milliSeconds);
        }
        System.out.println("Succesfully Modified..!!!");
    }

    public static FileVO segregateFiles(File folder) {
        List<File> folderList = new ArrayList<>();
        List<File> fileList = new ArrayList<>();

        File[] listOfFiles = folder.listFiles();
        for (int i = 0; i < listOfFiles.length; i++) {
            if (listOfFiles[i].isFile()) {
                fileList.add(listOfFiles[i]);
            } else {
                folderList.add(listOfFiles[i]);
            }
            System.out.println(listOfFiles[i]);
        }
        return new FileVO(fileList, folderList);
    }
}



FileVO.java
package com.example;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

public class FileVO {
    List<File> fileList = new ArrayList<>();
    List<File> folderList = new ArrayList<>();

    public FileVO(List<File> fileList, List<File> folderList) {
        this.fileList = fileList;
        this.folderList = folderList;
    }

    public List<File> getFileList() {
        return fileList;
    }

    public void setFileList(List<File> fileList) {
        this.fileList = fileList;
    }

    public List<File> getFolderList() {
        return folderList;
    }

    public void setFolderList(List<File> folderList) {
        this.folderList = folderList;
    }
}




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