java代码练习第8课

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;  }}

package pack02;import java.awt.Container;import java.awt.GridLayout;import javax.swing.DefaultListModel;import javax.swing.JFrame;import javax.swing.JList;import javax.swing.JScrollPane;import javax.swing.WindowConstants;public class test036 extends JFrame{  public static void main(String[] args){    new test036();  }    public test036(){    this.setTitle("DefaultListModel");    this.setLayout(new GridLayout(2,1,5,5));    Container container1 = this.getContentPane();    JList<String> list1 = new JList<>(new MyDefaultListModel());    JScrollPane scrollPane1 = new JScrollPane(list1);    container1.add(scrollPane1);        final String[] flavors = new String[] {"列表1","列表2","列表3","列表4","列表5"};    final DefaultListModel<String> items = new DefaultListModel<>();    final JList<String> list2 = new JList<>(items);    for (int i = 0; i < flavors.length; i++)    {      items.add(i, flavors[i]);        }    JScrollPane scrollPane2 = new JScrollPane(list2);    container1.add(scrollPane2);        this.setSize(500,200);    this.setVisible(true);    this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);      }}class MyDefaultListModel extends DefaultListModel<String>{  private String[] contents = new String[] {"DefaultListModel1","DefaultListModel2","DefaultListModel3","DefaultListModel4","DefaultListModel5"};    public String getElementAt(int x){    if (x < contents.length)    {      return contents[x++];    }    else    {      return null;    }        }    public int getSize(){    return contents.length;  }}