package net.flood.ocrnn.util; import javax.swing.*; import javax.swing.filechooser.FileNameExtensionFilter; import java.awt.*; import java.io.File; /** * @author flood2d */ public class FileUtils { public static String getFileExtension(File file) { String parts[] = file.getName().split("\\."); return parts.length == 0 ? null : parts[parts.length - 1]; } public static File getFileWithOtherExtension(File file, String extension) { String parts[] = file.getName().split("\\."); String fileName = ""; for(int i = 0; i < parts.length - 1; i++) { fileName += parts[i]; } fileName += "." + extension; return new File(file.getParentFile(), fileName); } public static File chooseFile(Component parent, String description, String ... extensions) { JFileChooser fileChooser = new JFileChooser(); FileNameExtensionFilter filter = new FileNameExtensionFilter(description, extensions); fileChooser.setFileFilter(filter); fileChooser.setCurrentDirectory(new File(System.getProperty("user.dir"))); int returnVal = fileChooser.showOpenDialog(parent); if(returnVal == JFileChooser.APPROVE_OPTION) { return fileChooser.getSelectedFile(); } else { return null; } } }