java代码实例第35课

test035.java

package pack02;

import java.awt.Container;
import java.awt.GridLayout;
import java.util.Vector;

import javax.swing.AbstractListModel;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.WindowConstants;

public class test035 extends JFrame
{

  public static void main(String[] args)
  {
    new test035();    
  }

  public test035()
  {
    this.setTitle("列表框");
    Container container1 = this.getContentPane();
    this.setLayout(new GridLayout(3,1,5,5));

    String[] contents1 = new String[] {"String1","String2","String3","String4","String5"};
    JList<String> list1 = new JList<>(contents1);
    JScrollPane scrollPane1 = new JScrollPane(list1);

    Vector<String> content2 = new Vector<>();
    JList<String> list2 = new JList<>(content2);
    content2.add("Vector1");
    content2.add("Vector2");
    content2.add("Vector3");
    content2.add("Vector4");
    content2.add("Vector5");
    JScrollPane scrollPane2 = new JScrollPane(list2);

    JList<String> list3 = new JList<>(new MyListModel1());
    JScrollPane scrollPane3 = new JScrollPane(list3);

    container1.add(scrollPane1);
    container1.add(scrollPane2);
    container1.add(scrollPane3);

    this.setSize(500,300);
    this.setVisible(true);
    this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

  }

}

class MyListModel1 extends AbstractListModel<String>
{
  private String[] contents = new String[] {"AbstractListModel1","AbstractListModel2","AbstractListModel3","AbstractListModel4","AbstractListModel5"};
  public String getElementAt(int x)
  {
    if ( x < contents.length)
    {
      return contents[x++];
    }
    else
    {
      return null;
    }

  }

  public int getSize()
  {
    return contents.length;
  }
}