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Filter for JFileChooser

/ Published in: Java
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  1. import javax.swing.filechooser.FileFilter;
  2. import java.io.File;
  3.  
  4. public class Filter extends FileFilter {
  5.     private boolean acceptDirs = true;
  6.     private String  desc;
  7.     private String  ext;
  8.  
  9.     public Filter(String ext) {
  10.         this.ext  = ext;
  11.         this.desc = ext + "-Files (" + generateExtensionString(ext) + ")";
  12.     }
  13.  
  14.     public Filter(String ext, String desc) {
  15.         this.ext  = ext;
  16.         this.desc = desc + " (" + generateExtensionString(ext) + ")";
  17.     }
  18.  
  19.     public String getDescription() {
  20.         return desc;
  21.     }
  22.  
  23.     public boolean accept(File f) {
  24.         if (f.isDirectory() && acceptDirs) {
  25.             return true;
  26.         }
  27.  
  28.         if (!isMultiExtensionString(ext)) {
  29.             return f.getName().endsWith(ext);
  30.         }
  31.  
  32.         String[] exts = ext.split(",");
  33.  
  34.         for (int i = 0; i < exts.length; i++) {
  35.             if (f.getName().endsWith(exts[i])) {
  36.                 return true;
  37.             }
  38.         }
  39.  
  40.         return false;
  41.     }                
  42.  
  43.     protected boolean isMultiExtensionString(String ext) {
  44.         return ext.indexOf(',') >= 0;
  45.     }
  46.  
  47.     protected String generateExtensionString(String ext) {
  48.         String[]     exts = ext.split(",");
  49.         StringBuffer sb   = new StringBuffer();
  50.  
  51.         for (int i = 0; i < exts.length; i++) {
  52.             sb.append("*.");
  53.             sb.append(exts[i]);
  54.  
  55.             if (i != exts.length - 1) {
  56.                 sb.append(",");
  57.             }
  58.         }
  59.  
  60.         return sb.toString();
  61.     }
  62. }
  63.  

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