// SimpleFileFilter.java
// A straightforward extension-based example of a file filter. This should be
// replaced by a "first class" Swing class in a later release of Swing.
//
import javax.swing.filechooser.*;
import java.io.File;
public class SimpleFileFilter extends FileFilter {
String[] extensions;
String description;
public SimpleFileFilter(String ext) {
this (new String[] {ext}, null);
}
public SimpleFileFilter(String[] exts, String descr) {
// clone and lowercase the extensions
extensions = new String[exts.length];
for (int i = exts.length - 1; i >= 0; i--) {
extensions[i] = exts[i].toLowerCase();
}
// make sure we have a valid (if simplistic) description
description = (descr == null ? exts[0] + " files" : descr);
}
public boolean accept(File f) {
// we always allow directories, regardless of their extension
if (f.isDirectory()) { return true; }
// ok, it's a regular file so check the extension
String name = f.getName().toLowerCase();
for (int i = extensions.length - 1; i >= 0; i--) {
if (name.endsWith(extensions[i])) {
return true;
}
}
return false;
}
public String getDescription() { return description; }
}
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