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云代码 - java代码库

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2017-12-26 作者: 柯侧耳倾听者举报

[java]代码库

import java.util.*;
import java.awt.BorderLayout;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;
public class ListTest
{
    private JFrame mainWin = new JFrame("测试列表框");
    String[] books = new String[]
    {
        "疯狂Java讲义"
        , "轻量级Java EE企业应用实战"
        , "疯狂Android讲义"
        , "疯狂Ajax讲义"
        , "经典Java EE企业应用实战"
    };
    JList<String> bookList = new JList<>(books);
    JComboBox<String> bookSelector;
    JPanel layoutPanel = new JPanel();
    ButtonGroup layoutGroup = new ButtonGroup();
    JPanel selectModePanel = new JPanel();
    ButtonGroup selectModeGroup = new ButtonGroup();
    JTextArea favoriate = new JTextArea(4 , 40);
    public void init()
    {
        bookList.setVisibleRowCount(3);
        bookList.setSelectionInterval(2, 4);
        addLayoutButton("纵向滚动", JList.VERTICAL);
        addLayoutButton("纵向换行", JList.VERTICAL_WRAP);
        addLayoutButton("横向换行", JList.HORIZONTAL_WRAP);
        addSelectModelButton("无限制", ListSelectionModel
            .MULTIPLE_INTERVAL_SELECTION);
        addSelectModelButton("单选", ListSelectionModel
            .SINGLE_SELECTION);
        addSelectModelButton("单范围", ListSelectionModel
            .SINGLE_INTERVAL_SELECTION);
        Box listBox = new Box(BoxLayout.Y_AXIS);
        listBox.add(new JScrollPane(bookList));
        listBox.add(layoutPanel);
        listBox.add(selectModePanel);
        bookList.addListSelectionListener(e -> { 
            List<String> books = bookList.getSelectedValuesList();
            favoriate.setText("");
            for (String book : books )
            {
                favoriate.append(book + "\n");
            }
        });
        Vector<String> bookCollection = new Vector<>();
        bookCollection.add("疯狂Java讲义");
        bookCollection.add("轻量级Java EE企业应用实战");
        bookCollection.add("疯狂Android讲义");
        bookCollection.add("疯狂Ajax讲义");
        bookCollection.add("经典Java EE企业应用实战");
        bookSelector = new JComboBox<>(bookCollection);
        bookSelector.addItemListener(e -> { 
            Object book = bookSelector.getSelectedItem();
            favoriate.setText(book.toString());
        });
        bookSelector.setEditable(true);
        bookSelector.setMaximumRowCount(4);
        JPanel p = new JPanel();
        p.add(bookSelector);
        Box box = new Box(BoxLayout.X_AXIS);
        box.add(listBox);
        box.add(p);
        mainWin.add(box);
        JPanel favoriatePanel = new JPanel();
        favoriatePanel.setLayout(new BorderLayout());
        favoriatePanel.add(new JScrollPane(favoriate));
        favoriatePanel.add(new JLabel("您喜欢的图书:")
            , BorderLayout.NORTH);
        mainWin.add(favoriatePanel , BorderLayout.SOUTH);
        mainWin.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        mainWin.pack();
        mainWin.setVisible(true);
    }
    private void addLayoutButton(String label, final int orientation)
    {
        layoutPanel.setBorder(new TitledBorder(new EtchedBorder()
            , "确定选项布局"));
        JRadioButton button = new JRadioButton(label);
        layoutPanel.add(button);
        if (layoutGroup.getButtonCount() == 0)
        button.setSelected(true);
        layoutGroup.add(button);
        button.addActionListener(event ->
            bookList.setLayoutOrientation(orientation));
    }
    private void addSelectModelButton(String label, final int selectModel)
    {
        selectModePanel.setBorder(new TitledBorder(new EtchedBorder()
            , "确定选择模式"));
        JRadioButton button = new JRadioButton(label);
        selectModePanel.add(button);
        if(selectModeGroup.getButtonCount() == 0)
            button.setSelected(true);
        selectModeGroup.add(button);
        button.addActionListener(event ->
            bookList.setSelectionMode(selectModel));
    }
    public static void main(String[] args)
    {
        new ListTest().init();
    }
}


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