extends FileView : FileView « javax.swing.filechooser « Java by API

1. Java by API
2. javax.swing.filechooser
3. FileView

extends FileView

import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.io.File;

import javax.swing.Icon;
import javax.swing.JFileChooser;
import javax.swing.filechooser.FileView;

public class MainClass {

  public static void main(String[] a) {
    JFileChooser fileChooser = new JFileChooser(".");
    FileView view = new JavaFileView();
    fileChooser.setFileView(view);
    int status = fileChooser.showOpenDialog(null);
    if (status == JFileChooser.APPROVE_OPTION) {
      File selectedFile = fileChooser.getSelectedFile();
      System.out.println(selectedFile.getParent());
      System.out.println(selectedFile.getName());
    } else if (status == JFileChooser.CANCEL_OPTION) {
      System.out.println("JFileChooser.CANCEL_OPTION");
    }
  }
}
class JavaFileView extends FileView {
  Icon javaIcon = new MyIcon(Color.BLUE);

  Icon classIcon = new MyIcon(Color.GREEN);

  Icon htmlIcon = new MyIcon(Color.RED);

  Icon jarIcon = new MyIcon(Color.PINK);

  public String getName(File file) {
    String filename = file.getName();
    if (filename.endsWith(".java")) {
      String name = filename + " : " + file.length();
      return name;
    }
    return null;
  }

  public String getTypeDescription(File file) {
    String typeDescription = null;
    String filename = file.getName().toLowerCase();

    if (filename.endsWith(".java")) {
      typeDescription = "Java Source";
    } else if (filename.endsWith(".class")) {
      typeDescription = "Java Class File";
    } else if (filename.endsWith(".jar")) {
      typeDescription = "Java Archive";
    } else if (filename.endsWith(".html") || filename.endsWith(".htm")) {
      typeDescription = "Applet Loader";
    }
    return typeDescription;
  }

  public Icon getIcon(File file) {
    if (file.isDirectory()) {
      return null;
    }
    Icon icon = null;
    String filename = file.getName().toLowerCase();
    if (filename.endsWith(".java")) {
      icon = javaIcon;
    } else if (filename.endsWith(".class")) {
      icon = classIcon;
    } else if (filename.endsWith(".jar")) {
      icon = jarIcon;
    } else if (filename.endsWith(".html") || filename.endsWith(".htm")) {
      icon = htmlIcon;
    }
    return icon;
  }
}

class MyIcon implements Icon {
  Color myColor;

  public MyIcon(Color myColor) {
    this.myColor = myColor;
  }

  public int getIconWidth() {
    return 16;
  }

  public int getIconHeight() {
    return 16;
  }

  public void paintIcon(Component c, Graphics g, int x, int y) {
    g.setColor(myColor);
    g.drawRect(0, 0, 16, 16);
  }
}
           
       

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