我用的是JFileChooser
JFileChooser fileChooser = new JFileChooser();
String str[] = { "dat", "data", "doc", "txt" };
for (int i = 0; i < str.length; i++)
fileChooser.addChoosableFileFilter(new FileNameExtensionFilter(
str[i], str[i]));麻烦最好给段例子!!
JFileChooser fileChooser = new JFileChooser();
String str[] = { "dat", "data", "doc", "txt" };
for (int i = 0; i < str.length; i++)
fileChooser.addChoosableFileFilter(new FileNameExtensionFilter(
str[i], str[i]));麻烦最好给段例子!!
import java.io.File;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.filechooser.FileFilter;public class enCode {
public static void main(String[] args) {
JFileChooser fileChooser = new JFileChooser();
fileChooser.addChoosableFileFilter(new JavaFileFilter());
fileChooser.addChoosableFileFilter(new TxtFileFilter());
String selectfilename = null;
int returnVal = fileChooser.showOpenDialog(new JFrame());
if(returnVal == JFileChooser.APPROVE_OPTION) {
String dir = fileChooser.getSelectedFile().getParent();
if( fileChooser.getFileFilter() instanceof JavaFileFilter ){
selectfilename = fileChooser.getSelectedFile().getName()+".java";
}else if( fileChooser.getFileFilter() instanceof TxtFileFilter ){
selectfilename = fileChooser.getSelectedFile().getName()+".txt";
}
System.out.println(dir+File.separator+selectfilename);
}
}
}class JavaFileFilter extends FileFilter {
public String getDescription() {
return "java源文件(*.java)";
}
public boolean accept(File file) {
return file.getName().toLowerCase().endsWith(".java");
}
}class TxtFileFilter extends FileFilter {
public String getDescription() {
return "文本文档(*.txt)";
}
public boolean accept(File file) {
return file.getName().toLowerCase().endsWith(".txt");
}}