java代码疑问，eclips中讲代码用删除线划掉并提示deprecated是什么情况？

您好，提问者：

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意思是说此方法已过时，过时的原因就是有API的类替代了次方法。

提示：可以正常使用的，就是一个提示而已。

JavaApple出现删除线为什么

点击“文件”，选另存为。

在另存为快捷菜单的保存类型中选“文档模板”。

或者将C:\WINDOWS\Application Data\Microsoft\Templates中Normal.dot直接删除。

别担心，在word再次开启时，程序会重新自动创建一个normal。（我刚刚在自己的电脑中试过）

删除它对word程序本身没有损坏，只是你的一些在菜单上的个性化设置没有了，回到了程序初次安装时的模佯，只要在重新设置一下就行了。

JAVA方法上加了删除线

java某些对象的方法点后面有删除线，表明这个方法随着JDK的升级不推荐使用了，对象肯定有其他方法可以替代带删除线方法，效率、逻辑性更高。

java文本操作 删除文本中的某一行（或一个对象）

你说的不就是一个记事本吗，

//import java packages

import java.awt.*;

import java.awt.event.*;

import java.text.*;

import java.util.*;

import java.io.*;

import javax.swing.undo.*;

import javax.swing.border.*;

import javax.swing.*;

import javax.swing.text.*;

import javax.swing.event.*;

import java.awt.datatransfer.*;

public class Notepad extends JFrame implements ActionListener,DocumentListener{

//定义变量

//菜单

JMenu fileMenu,editMenu,formatMenu,viewMenu,helpMenu;

//"文件"的菜单项

JMenuItem fileMenu_New,fileMenu_Open,fileMenu_Save,fileMenu_SaveAs,fileMenu_PageSetup,fileMenu_Print,fileMenu_Exit;

//"编辑"的菜单项

JMenuItem editMenu_Undo,editMenu_Redo,editMenu_Cut,editMenu_Copy,editMenu_Paste,editMenu_Delete,editMenu_Find,editMenu_FindNext,editMenu_Replace,

editMenu_GoTo,editMenu_SelectAll,editMenu_TimeDate;

//"格式"的菜单项

JCheckBoxMenuItem formatMenu_LineWrap;

JMenu formatMenu_Color;

JMenuItem formatMenu_Font,formatMenu_Color_FgColor,formatMenu_Color_BgColor;

//"查看"的菜单项

JCheckBoxMenuItem viewMenu_Status;

//"帮助"的菜单项

JMenuItem helpMenu_HelpTopics,helpMenu_About;

//文本编辑区域

JTextArea editArea;

//状态栏标签

JLabel statusLabel;

//弹出菜单及菜单项

JPopupMenu popupMenu;

JMenuItem popupMenu_Undo,popupMenu_Redo,popupMenu_Cut,popupMenu_Copy,popupMenu_Paste,popupMenu_Delete,popupMenu_SelectAll;

//系统剪贴板

Toolkit toolKit=Toolkit.getDefaultToolkit();

Clipboard clipBoard=toolKit.getSystemClipboard();

//其它变量

boolean isNewFile=true; //是否新文件(未保存过的)

File currentFile; //当前文件名

String oldValue; //存放编辑区原来的内容，用于比较文本是否有改动

JButton fontOkButton; //字体设置里的"确定"按钮

//工具栏按钮

JButton newButton,openButton,saveButton,saveAsButton,printButton,undoButton,redoButton,

cutButton,copyButton,pasteButton,deleteButton,searchButton,timeButton,fontButton,

boldButton,italicButton,fgcolorButton,bgcolorButton,helpButton;

//创建撤消操作管理器

protected UndoManager undo = new UndoManager();

protected UndoableEditListener undoHandler = new UndoHandler();

//设置编辑区默认字体

protected Font defaultFont=new Font("宋体",Font.PLAIN,12);

//构造函数开始

public Notepad()

{

super("黄斌的记事本");

//获取容器

Container container=getContentPane();

//创建菜单条

JMenuBar menuBar = new JMenuBar();

//创建文件菜单及菜单项并注册事件监听

JMenu fileMenu = new JMenu("文件(F)", true);

fileMenu.setMnemonic('F');

fileMenu_New = new JMenuItem("新建(N)", 'N');

fileMenu_New.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N, InputEvent.CTRL_MASK));

fileMenu_New.addActionListener(this);

fileMenu_Open = new JMenuItem("打开(O)...", 'O');

fileMenu_Open.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O, InputEvent.CTRL_MASK));

fileMenu_Open.addActionListener(this);

fileMenu_Save = new JMenuItem("保存(S)", 'S');

fileMenu_Save.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S, InputEvent.CTRL_MASK));

fileMenu_Save.addActionListener(this);

fileMenu_SaveAs = new JMenuItem("另存为(A)...", 'A');

fileMenu_SaveAs.addActionListener(this);

fileMenu_PageSetup = new JMenuItem("页面设置(U)...",'U');

fileMenu_PageSetup.addActionListener(this);

fileMenu_Print = new JMenuItem("打印(P)...", 'P');

fileMenu_Print.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_P, InputEvent.CTRL_MASK));

fileMenu_Print.addActionListener(this);

fileMenu_Exit = new JMenuItem("退出(X)",'X');

fileMenu_Exit.addActionListener(this);

//创建编辑菜单及菜单项并注册事件监听

JMenu editMenu = new JMenu("编辑(E)", true);

editMenu.setMnemonic('E');

editMenu.addActionListener(new ActionListener()

{

public void actionPerformed(ActionEvent e){

checkMenuItemEnabled();//设置剪切、复制、粘贴、删除等功能的可用性

}

}

);

editMenu_Undo = new JMenuItem("撤消(U)",'U');

editMenu_Undo.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Z, InputEvent.CTRL_MASK));

editMenu_Undo.addActionListener(this);

editMenu_Undo.setEnabled(false);

editMenu_Redo = new JMenuItem("重做(R)",'R');

editMenu_Redo.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Y,InputEvent.CTRL_MASK));

editMenu_Redo.addActionListener(this);

editMenu_Redo.setEnabled(false);

editMenu_Cut = new JMenuItem("剪切(T)",'T');

editMenu_Cut.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_X, InputEvent.CTRL_MASK));

editMenu_Cut.addActionListener(this);

editMenu_Copy = new JMenuItem("复制(C)",'C');

editMenu_Copy.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_C, InputEvent.CTRL_MASK));

editMenu_Copy.addActionListener(this);

editMenu_Paste = new JMenuItem("粘贴(P)",'P');

editMenu_Paste.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_V, InputEvent.CTRL_MASK));

editMenu_Paste.addActionListener(this);

editMenu_Delete = new JMenuItem("删除(L)",'L');

editMenu_Delete.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_DELETE, 0));

editMenu_Delete.addActionListener(this);

editMenu_Find = new JMenuItem("查找(F)...",'F');

editMenu_Find.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F, InputEvent.CTRL_MASK));

editMenu_Find.addActionListener(this);

editMenu_FindNext = new JMenuItem("查找下一个(N)",'N');

editMenu_FindNext.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F3,0));

editMenu_FindNext.addActionListener(this);

editMenu_Replace = new JMenuItem("替换(R)...",'R');

editMenu_Replace.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_H, InputEvent.CTRL_MASK));

editMenu_Replace.addActionListener(this);

editMenu_GoTo = new JMenuItem("转到(G)...",'G');

editMenu_GoTo.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_G, InputEvent.CTRL_MASK));

editMenu_GoTo.addActionListener(this);

editMenu_SelectAll = new JMenuItem("全选",'A');

editMenu_SelectAll.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_A, InputEvent.CTRL_MASK));

editMenu_SelectAll.addActionListener(this);

editMenu_TimeDate = new JMenuItem("时间/日期(D)",'D');

editMenu_TimeDate.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F5,0));

editMenu_TimeDate.addActionListener(this);

//创建格式菜单及菜单项并注册事件监听

JMenu formatMenu = new JMenu("格式(O)", true);

formatMenu.setMnemonic('O');

formatMenu_LineWrap = new JCheckBoxMenuItem("自动换行(W)");

formatMenu_LineWrap.setMnemonic('W');

formatMenu_LineWrap.setState(true);

formatMenu_LineWrap.addActionListener(this);

formatMenu_Font = new JMenuItem("字体(F)...",'F');

formatMenu_Font.addActionListener(this);

formatMenu_Color = new JMenu("设置颜色");

formatMenu_Color_FgColor=new JMenuItem("字体颜色");

formatMenu_Color_FgColor.addActionListener(this);

formatMenu_Color_BgColor=new JMenuItem("背景颜色");

formatMenu_Color_BgColor.addActionListener(this);

//创建查看菜单及菜单项并注册事件监听

JMenu viewMenu = new JMenu("查看(V)", true);

viewMenu.setMnemonic('V');

viewMenu_Status = new JCheckBoxMenuItem("状态栏(S)");

viewMenu_Status.setMnemonic('S');

viewMenu_Status.setState(true);

viewMenu_Status.addActionListener(this);

//创建帮助菜单及菜单项并注册事件监听

JMenu helpMenu = new JMenu("帮助(H)", true);

helpMenu.setMnemonic('H');

helpMenu_HelpTopics = new JMenuItem("帮助主题(H)",'H');

helpMenu_HelpTopics.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F1,0));

helpMenu_HelpTopics.addActionListener(this);

helpMenu_About = new JMenuItem("关于记事本(A)",'A');

helpMenu_About.addActionListener(this);

//向菜单条添加"文件"菜单及菜单项

menuBar.add(fileMenu);

fileMenu.add(fileMenu_New);

fileMenu.add(fileMenu_Open);

fileMenu.add(fileMenu_Save);

fileMenu.add(fileMenu_SaveAs);

fileMenu.addSeparator(); //分隔线

fileMenu.add(fileMenu_PageSetup);

fileMenu.add(fileMenu_Print);

fileMenu.addSeparator(); //分隔线

fileMenu.add(fileMenu_Exit);

//向菜单条添加"编辑"菜单及菜单项

menuBar.add(editMenu);

editMenu.add(editMenu_Undo);

editMenu.add(editMenu_Redo);

editMenu.addSeparator(); //分隔线

editMenu.add(editMenu_Cut);

editMenu.add(editMenu_Copy);

editMenu.add(editMenu_Paste);

editMenu.add(editMenu_Delete);

editMenu.addSeparator(); //分隔线

editMenu.add(editMenu_Find);

editMenu.add(editMenu_FindNext);

editMenu.add(editMenu_Replace);

editMenu.add(editMenu_GoTo);

editMenu.addSeparator(); //分隔线

editMenu.add(editMenu_SelectAll);

editMenu.add(editMenu_TimeDate);

//向菜单条添加"格式"菜单及菜单项

menuBar.add(formatMenu);

formatMenu.add(formatMenu_LineWrap);

formatMenu.add(formatMenu_Font);

formatMenu.addSeparator();

formatMenu.add(formatMenu_Color);

formatMenu_Color.add(formatMenu_Color_FgColor);

formatMenu_Color.add(formatMenu_Color_BgColor);

//向菜单条添加"查看"菜单及菜单项

menuBar.add(viewMenu);

viewMenu.add(viewMenu_Status);

//向菜单条添加"帮助"菜单及菜单项

menuBar.add(helpMenu);

helpMenu.add(helpMenu_HelpTopics);

helpMenu.addSeparator();

helpMenu.add(helpMenu_About);

//向窗口添加菜单条

this.setJMenuBar(menuBar);

//创建文本编辑区并添加滚动条

editArea=new JTextArea(20,50);

JScrollPane scroller=new JScrollPane(editArea);

scroller.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

container.add(scroller,BorderLayout.CENTER);//向容器添加文本编辑区

editArea.setWrapStyleWord(true); //设置单词在一行不足容纳时换行

editArea.setLineWrap(true); //设置文本编辑区自动换行默认为true,即会"自动换行"

editArea.setFont(defaultFont); //设置编辑区默认字体

editArea.setBackground(Color.white); //设置编辑区默认背景色

editArea.setForeground(Color.black); //设置编辑区默认前景色

oldValue=editArea.getText(); //获取原文本编辑区的内容

//编辑区注册事件监听

editArea.getDocument().addUndoableEditListener(undoHandler);

editArea.getDocument().addDocumentListener(this);

//创建右键弹出菜单

popupMenu=new JPopupMenu();

popupMenu_Undo=new JMenuItem("撤消(U)",'U');

popupMenu_Redo=new JMenuItem("重做(R)",'R');

popupMenu_Cut =new JMenuItem("剪切(T)",'T');

popupMenu_Copy=new JMenuItem("复制(C)",'C');

popupMenu_Paste=new JMenuItem("粘贴(P)",'P');

popupMenu_Delete=new JMenuItem("删除(D)",'D');

popupMenu_SelectAll=new JMenuItem("全选(A)",'A');

popupMenu_Undo.setEnabled(false); //撤消选项初始设为不可用

popupMenu_Redo.setEnabled(false); //重做选项初始设为不可用

//向右键菜单添加菜单项和分隔符

popupMenu.add(popupMenu_Undo);

popupMenu.add(popupMenu_Redo);

popupMenu.addSeparator();

popupMenu.add(popupMenu_Cut);

popupMenu.add(popupMenu_Copy);

popupMenu.add(popupMenu_Paste);

popupMenu.add(popupMenu_Delete);

popupMenu.addSeparator();

popupMenu.add(popupMenu_SelectAll);

//右键菜单注册事件

popupMenu_Undo.addActionListener(this);

popupMenu_Redo.addActionListener(this);

popupMenu_Cut.addActionListener(this);

popupMenu_Copy.addActionListener(this);

popupMenu_Paste.addActionListener(this);

popupMenu_Delete.addActionListener(this);

popupMenu_SelectAll.addActionListener(this);

//文本编辑区注册右键菜单事件

editArea.addMouseListener(

new MouseAdapter(){

public void mousePressed(MouseEvent e)

{

checkForTriggerEvent(e);

}

public void mouseReleased(MouseEvent e)

{

checkForTriggerEvent(e);

}

private void checkForTriggerEvent(MouseEvent e)

{

if(e.isPopupTrigger())

popupMenu.show(e.getComponent(),e.getX(),e.getY());

checkMenuItemEnabled(); //设置剪切、复制、粘贴、删除等功能的可用性

editArea.requestFocus(); //编辑区获取焦点

}

});

//创建工具栏

JPanel toolBar=new JPanel();

toolBar.setLayout(new FlowLayout(FlowLayout.LEFT));

Icon newIcon=new ImageIcon("Icons/new.gif");

Icon openIcon=new ImageIcon("Icons/open.gif");

Icon saveIcon=new ImageIcon("Icons/save.gif");

Icon saveAsIcon=new ImageIcon("Icons/saveas.gif");

Icon printIcon=new ImageIcon("Icons/print.gif");

Icon undoIcon=new ImageIcon("Icons/undo.gif");

Icon redoIcon=new ImageIcon("Icons/redo.gif");

Icon cutIcon=new ImageIcon("Icons/cut.gif");

Icon copyIcon=new ImageIcon("Icons/copy.gif");

Icon pasteIcon=new ImageIcon("Icons/paste.gif");

Icon deleteIcon=new ImageIcon("Icons/delete.gif");

Icon searchIcon=new ImageIcon("Icons/search.gif");

Icon timeIcon=new ImageIcon("Icons/time.gif");

Icon fontIcon=new ImageIcon("Icons/font.gif");

Icon boldIcon=new ImageIcon("Icons/bold.gif");

Icon italicIcon=new ImageIcon("Icons/italic.gif");

Icon bgcolorIcon=new ImageIcon("Icons/bgcolor.gif");

Icon fgcolorIcon=new ImageIcon("Icons/fgcolor.gif");

Icon helpIcon=new ImageIcon("Icons/help.gif");

newButton= new JButton(newIcon);

openButton=new JButton(openIcon);

saveButton= new JButton(saveIcon);

saveAsButton=new JButton(saveAsIcon);

printButton=new JButton(printIcon);

undoButton=new JButton(undoIcon);

undoButton.setEnabled(false);

redoButton=new JButton(redoIcon);

redoButton.setEnabled(false);

cutButton=new JButton(cutIcon);

cutButton.setEnabled(false);

copyButton=new JButton(copyIcon);

copyButton.setEnabled(false);

pasteButton=new JButton(pasteIcon);

pasteButton.setEnabled(false);

deleteButton=new JButton(deleteIcon);

deleteButton.setEnabled(false);

searchButton=new JButton(searchIcon);

timeButton=new JButton(timeIcon);

fontButton=new JButton(fontIcon);

boldButton=new JButton(boldIcon);

italicButton=new JButton(italicIcon);

fgcolorButton=new JButton(fgcolorIcon);

bgcolorButton=new JButton(bgcolorIcon);

helpButton=new JButton(helpIcon);

newButton.setPreferredSize(new Dimension(22,22));

openButton.setPreferredSize(new Dimension(22,22));

saveButton.setPreferredSize(new Dimension(22,22));

saveAsButton.setPreferredSize(new Dimension(22,22));

printButton.setPreferredSize(new Dimension(22,22));

undoButton.setPreferredSize(new Dimension(22,22));

redoButton.setPreferredSize(new Dimension(22,22));

cutButton.setPreferredSize(new Dimension(22,22));

copyButton.setPreferredSize(new Dimension(22,22));

pasteButton.setPreferredSize(new Dimension(22,22));

deleteButton.setPreferredSize(new Dimension(22,22));

searchButton.setPreferredSize(new Dimension(22,22));

timeButton.setPreferredSize(new Dimension(22,22));

fontButton.setPreferredSize(new Dimension(22,22));

boldButton.setPreferredSize(new Dimension(22,22));

italicButton.setPreferredSize(new Dimension(22,22));

fgcolorButton.setPreferredSize(new Dimension(22,22));

bgcolorButton.setPreferredSize(new Dimension(22,22));

helpButton.setPreferredSize(new Dimension(22,22));

//注册工具栏按钮事件

newButton.addActionListener(this);

openButton.addActionListener(this);

saveButton.addActionListener(this);

saveAsButton.addActionListener(this);

printButton.addActionListener(this);

undoButton.addActionListener(this);

redoButton.addActionListener(this);

cutButton.addActionListener(this);

copyButton.addActionListener(this);

pasteButton.addActionListener(this);

deleteButton.addActionListener(this);

searchButton.addActionListener(this);

timeButton.addActionListener(this);

fontButton.addActionListener(this);

boldButton.addActionListener(this);

italicButton.addActionListener(this);

fgcolorButton.addActionListener(this);

bgcolorButton.addActionListener(this);

helpButton.addActionListener(this);

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