java - Java Swing 文本编辑器

Question

可能重复：
我应该使用哪些组件来构建 Java WYSIWYG HTML 编辑器

我是Java编程的新手。我必须在 Swing/AWT 中做文本编辑器，对此我有一个问题。如何编辑一个选定的单词，例如更改其颜色？我应该使用哪个组件和哪些功能？

Answer 1

对于 Java Swing 的初学者，请尽量让这个项目保持简单。要在同一个文档中显示多种颜色和多种尺寸，需要大量复杂的编码和渲染 html。

尽量只提供基本的复制、剪切、粘贴功能，因为它们更容易实现。

要提供这些功能，一个 JTextArea 就足够了。

尝试这个。这是一个非常简单的文本编辑器

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Document extends JFrame implements ActionListener
{
private JTextArea ta;
private int count;
private JMenuBar menuBar;
private JMenu fileM,editM,viewM;
private JScrollPane scpane;
private JMenuItem exitI,cutI,copyI,pasteI,selectI,saveI,loadI,statusI;
private String pad;
private JToolBar toolBar;
public Document()
{
    super("Document");
    setSize(600, 600);
    setLocationRelativeTo(null);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container pane = getContentPane();
    pane.setLayout(new BorderLayout());

    count = 0;
    pad = " ";
    ta = new JTextArea(); //textarea
    menuBar = new JMenuBar(); //menubar
    fileM = new JMenu("File"); //file menu
    editM = new JMenu("Edit"); //edit menu
    viewM = new JMenu("View"); //edit menu
    scpane = new JScrollPane(ta); //scrollpane  and add textarea to scrollpane
    exitI = new JMenuItem("Exit");
    cutI = new JMenuItem("Cut");
    copyI = new JMenuItem("Copy");
    pasteI = new JMenuItem("Paste");
    selectI = new JMenuItem("Select All"); //menuitems
    saveI = new JMenuItem("Save"); //menuitems
    loadI = new JMenuItem("Load"); //menuitems
    statusI = new JMenuItem("Status"); //menuitems
    toolBar = new JToolBar();

    ta.setLineWrap(true);
    ta.setWrapStyleWord(true);

    setJMenuBar(menuBar);
    menuBar.add(fileM);
    menuBar.add(editM);
    menuBar.add(viewM);

    fileM.add(saveI);
    fileM.add(loadI);
    fileM.add(exitI);

    editM.add(cutI);
    editM.add(copyI);
    editM.add(pasteI);        
    editM.add(selectI);

    viewM.add(statusI);

    saveI.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S, ActionEvent.CTRL_MASK));
    loadI.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_L, ActionEvent.CTRL_MASK));
    cutI.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X, ActionEvent.CTRL_MASK));
    copyI.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C, ActionEvent.CTRL_MASK));
    pasteI.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V, ActionEvent.CTRL_MASK));
    selectI.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A, ActionEvent.CTRL_MASK));

    pane.add(scpane,BorderLayout.CENTER);
    pane.add(toolBar,BorderLayout.SOUTH);

    saveI.addActionListener(this);
    loadI.addActionListener(this);
    exitI.addActionListener(this);
    cutI.addActionListener(this);
    copyI.addActionListener(this);
    pasteI.addActionListener(this);
    selectI.addActionListener(this);
    statusI.addActionListener(this);

    setVisible(true);
}
public void actionPerformed(ActionEvent e) 
{
    JMenuItem choice = (JMenuItem) e.getSource();
    if (choice == saveI)
    {
        //not yet implmented
    }
    else if (choice == exitI)
        System.exit(0);
    else if (choice == cutI)
    {
        pad = ta.getSelectedText();
        ta.replaceRange("", ta.getSelectionStart(), ta.getSelectionEnd());
    }
    else if (choice == copyI)
        pad = ta.getSelectedText();
    else if (choice == pasteI)
        ta.insert(pad, ta.getCaretPosition());
    else if (choice == selectI)
        ta.selectAll();
    else if (e.getSource() == statusI)
    {
        //not yet implmented
    }
}
public static void main(String[] args) 
{
    new Document();
}