实验1 扫雷小游戏
1．答案：
【代码1】： new LinkedList();
【代码2】： list.add(block[i][j]) ;
【代码3】： list.size();
【代码4】： (Block)list.get(randomIndex);
【代码5】： list.remove(randomIndex);
2．模板代码
Block.java
public class Block
{ String name;
int number;
boolean boo=false;
public void setName(String name)
{ this.name=name;
}
public void setNumber(int n)
{ number=n;
}
public int getNumber()
{ return number;
}
public String getName()
{ return name;
}
boolean isMine()
{ return boo;
}
public void setIsMine(boolean boo)
{ this.boo=boo;
}
}
LayMines.java
import java.util.LinkedList;
public class LayMines
{ public void layMinesForBlock(Block block[][],int mineCount)
{ int row=block.length;
int column=block[0].length;
LinkedList list=【代码1】 //创建空链表list
for(int i=0;i<row;i++)
{ for(int j=0;j<column;j++)
{ 【代码2】 // list添加节点，其中的数据为block[i][j]
}
}
while(mineCount>0)
{ int size=【代码3】 // list返回节点的个数
int randomIndex=(int)(Math.random()*size);
Block b=【代码4】 // list返回索引为randomIndex的节点中的数据
b.setName("雷");
b.setIsMine(true);
【代码5】 //list删除索引值为randomIndex的节点
mineCount--;
}
for(int i=0;i<row;i++)
{ for(int j=0;j<column;j++)
{ if(block[i][j].isMine()){}
else
{ int mineNumber=0;
for(int k=Math.max(i-1,0);k<=Math.min(i+1,row-1);k++)
{ for(int t=Math.max(j-1,0);t<=Math.min(j+1,column-1);t++)
{ if(block[k][t].isMine())
mineNumber++;
}
}
block[i][j].setName(""+mineNumber);
block[i][j].setNumber(mineNumber);
}
}
}
}
}
BlockView.java
import java.awt.*;
public class BlockView extends Panel
{ Label blockName;
Button blockCover;
CardLayout card;
BlockView()
{ card=new CardLayout();
setLayout(card);
blockName=new Label();
blockCover=new Button();
add("cover",blockCover);
add("name",blockName);
}
public void setName(String name)
{ blockName.setText(name);
}
public String getName()
{ return blockName.getText();
}
public void seeBlockName()
{ card.show(this,"name");
validate();
}
public void seeBlockCover()
{ card.show(this,"cover");
validate();
}
public Button getBlockCover()
{ return blockCover;
}
}
MineFrame.java
import java.awt.*;
import java.awt.event.*;
public class MineFrame extends Frame implements ActionListener
{ Button reStart;
Block block[][];
BlockView blockView[][];
LayMines lay;
int row=10,colum=12,mineCount=22;
int colorSwitch=0;
Panel pCenter,pNorth;
public MineFrame()
{ reStart=new Button("重新开始");
pCenter=new Panel();
pNorth=new Panel();
pNorth.setBackground(Color.cyan);
block=new Block[row][colum];
for(int i=0;i<row;i++)
{ for(int j=0;j<colum;j++)
{ block[i][j]=new Block();
}
}
lay=new LayMines();
lay.layMinesForBlock(block,mineCount);
blockView=new BlockView[row][colum];
pCenter.setLayout(new GridLayout(row,colum));
for(int i=0;i<row;i++)
{ for(int j=0;j<colum;j++)
{ blockView[i][j]=new BlockView();
blockView[i][j].setName(block[i][j].getName());
pCenter.add(blockView[i][j]);
blockView[i][j].getBlockCover().addActionListener(this);
}
}
reStart.addActionListener(this);
pNorth.add(reStart);
add(pNorth,BorderLayout.NORTH);
add(pCenter,BorderLayout.CENTER);
setSize(200,232);
setVisible(true);
addWindowListener(new WindowAdapter()
{ public void windowClosing(WindowEvent e)
{ System.exit(0);
}
});
validate();
}
public void actionPerformed(ActionEvent e)
{ Button source=(Button)e.getSource();
if(source!=reStart)
{ int m=-1,n=-1;
for(int i=0;i<row;i++)
{ for(int j=0;j<colum;j++)
{ if(source==blockView[i][j].getBlockCover())
{ m=i;
n=j;
break;
}
}
}
if(block[m][n].isMine())
{ for(int i=0;i<row;i++)
{ for(int j=0;j<colum;j++)
{ blockView[i][j].getBlockCover().removeActionListener(this);
if(block[i][j].isMine())
blockView[i][j].seeBlockName();
}
}
}
else
{ if(block[m][n].getNumber()>0)
blockView[m][n].seeBlockName();
else if(block[m][n].getNumber()==0)
for(int k=Math.max(m-1,0);k<=Math.min(m+1,row-1);k++)
{ for(int t=Math.max(n-1,0);t<=Math.min(n+1,colum-1);t++)
{ blockView[k][t].seeBlockName();
}
}
}
}
if(source==reStart)
{ for(int i=0;i<row;i++)
{ for(int j=0;j<colum;j++)
{ block[i][j].setIsMine(false);
}
}
lay.layMinesForBlock(block,mineCount);
for(int i=0;i<row;i++)
{ for(int j=0;j<colum;j++)
{ blockView[i][j].setName(block[i][j].getName());
blockView[i][j].seeBlockCover();
blockView[i][j].getBlockCover().addActionListener(this);
}
}
}
}
}
MineExample.java
public class LayMineMainClass
{ public static void main(String args[])
{ new MineFrame();
}
}
实验2 排序与查找
2．模板代码
Book.java
public class Book implements Comparable
{ double price;
String name;
public void setPrice(double c)
{ price=c;
}
public double getPrice()
{ return price;
}
public void setName(String n)
{ name=n;
}
public String getName()
{ return name;
}
public int compareTo(Object object)
{ Book bk=(Book)object;
int difference=(int)((this.getPrice()-bk.getPrice())*10000);
return difference;
}
}
SortSearchMainClass.java
import java.util.*;
public class SortSearchMainClass
{ public static void main(String args[])
{ LinkedList bookList=new LinkedList();
String bookName[]={"Java编程","XML基础","JSP基础","C++基础",
"J2ME编程","操作系统","数据库技术"};
double bookPrice[]={29,21,22,29,34,32,29};
Book book[]=new Book[bookName.length];
for(int k=0;k<book.length;k++)
{ book[k]=new Book();
book[k].setName(bookName[k]);
book[k].setPrice(bookPrice[k]);
bookList.add(book[k]);
}
Book newBook=new Book();
newBook.setPrice(29);
newBook.setName("Java与模式");
Collections.sort(bookList);
int m=-1;
System.out.println("新书:"+newBook.getName()+"("+newBook.getPrice()+
")与下列图书:");
while((m=Collections.binarySearch(bookList,newBook))>=0)
{ Book bk=(Book)bookList.get(m);
System.out.println(" "+bk.getName()+"("+bk.getPrice()+")");
bookList.remove(m);
}
System.out.println("价钱相同");
}
}
实验3 使用TreeSet排序
1．答案：
【代码1】： new TreeSet();
【代码2】： treeSet.add(stu);
【代码3】： tree.iterator();
【代码4】： te.hasNext()
【代码5】： (Student)te.next();
2．模板代码
Student.java
public class Student implements Comparable
{ String name;
int score;
Student(String name,int score)
{ this.name=name;
this.score=score;
}
public int compareTo(Object b)
{ Student st=(Student)b;
int m=this.score-st.score;
if(m!=0)
return m;
else
return 1;
}
public int getScore()
{ return score;
}
public String getName()
{ return name;
}
}
StudentFrame.java
import java.awt.*;
import java.awt.event.*;
import java.util.*;
public class StudentFrame extends Frame implements ActionListener
{ TextArea showArea;
TextField inputName,inputScore;
Button button;
TreeSet treeSet;
StudentFrame()
{ treeSet=【代码1】 //使用无参数构造方法创建treeSet
showArea=new TextArea();
showArea.setFont(new Font("",Font.BOLD,20));
inputName=new TextField(5);
inputScore=new TextField(5);
button=new Button("确定");
button.addActionListener(this);
Panel pNorth=new Panel();
pNorth.add(new Label("Name:"));
pNorth.add(inputName);
pNorth.add(new Label("Score:"));
pNorth.add(inputScore);
pNorth.add(button);
add(pNorth,BorderLayout.NORTH);
add(showArea,BorderLayout.CENTER);
setSize(300,320);
setVisible(true);
addWindowListener(new WindowAdapter()
{ public void windowClosing(WindowEvent e)
{ System.exit(0);
}
});
validate();
}
public void actionPerformed(ActionEvent e)
{ String name=inputName.getText();
int score=0;
try{ score=Integer.parseInt(inputScore.getText().trim());
if(name.length()>0)
{ Student stu=new Student(name,score);
【代码2】 // treeSet添加stu
show(treeSet);
}
}
catch(NumberFormatException exp)
{ inputScore.setText("请输入数字字符");
}
}
public void show(TreeSet tree)
{ showArea.setText(null);
Iterator te=【代码3】 // treeSet 返回迭代器
while(【代码4】) //te判断是否有下一个元素
{ Student stu=【代码5】 // te返回其中的下一个元素
showArea.append("Name:"+stu.getName()+" Score: "+stu.getScore()+"\n");
}
}
}
TreeSetMainClass.java
public class TreeSetMainClass
{ public static void main(String args[])
{ new StudentFrame();
}
}
上机实践12 java Swing
实验1 JLayeredPane分层窗格
1．答案：
【代码1】： pane.add(b5,JLayeredPane.DRAG_LAYER);
【代码2】： pane.add(b4,JLayeredPane.POPUP_LAYER);
【代码3】： pane.add(b3,JLayeredPane.MODAL_LAYER);
【代码4】： pane.add(b2,JLayeredPane.PALETTE_LAYER);
【代码5】： pane.add(b1,JLayeredPane.DEFAULT_LAYER);
2．模板代码
import javax.swing.*;
import java.awt.*;
class LayerExample
{ public static void main(String args[])
{ JFrame win=new JFrame("窗体");
win.setBounds(100,100,300,300);
win.setVisible(true);
JButton b1=new JButton("我在DEFAULT_LAYER"),
b2=new JButton("我在PALETTE_LAYER"),
b3 =new JButton("我在MODAL_LAYER"),
b4 =new JButton("我在POPUP_LAYER"),
b5=new JButton("我在DRAG_LAYER");
Container contenetPane=win.getContentPane();
JLayeredPane pane= new JLayeredPane();
pane.setLayout(null);
【代码1】 //pane将组件b5放置在DRAG_LAYER层
【代码2】 //pane将组件b4放置在POPUP_LAYER层
【代码3】 //pane将组件b3放置在MODAL_LAYER层
【代码4】 //pane将组件b2放置在PALETTE_LAYER层
【代码5】 //pane将组件b3放置在DEFAULT_LAYER层
b5.setBounds(50,50,200,100);
b4.setBounds(40,40,200,100);
b3.setBounds(30,30,200,100);
b2.setBounds(20,20,200,100);
b1.setBounds(10,10,200,100);
b1.setBackground(Color.red);
b2.setBackground(Color.pink);
b3.setBackground(Color.green);
b4.setBackground(Color.orange);
b5.setBackground(Color.yellow);
contenetPane.add(pane,BorderLayout.CENTER);
contenetPane.validate();
win.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
实验2 使用表格显示日历
1．答案：
【代码1】： table=new JTable(rili,name);
【代码2】： table=new JTable(rili,name);
【代码3】： table=new JTable(rili,name);
2．模板代码
CalendarBean.java
import java.util.Calendar;
public class CalendarBean
{ int year=2005,month=0,nextDay;
public void setYear(int year)
{ this.year=year;
}
public int getYear()
{ return year;
}
public void setMonth(int month)
{ this.month=month;
}
public int getMonth()
{ return month;
}
public String[][] getCalendar()
{ String a[][]=new String[6][7];
Calendar 日历=Calendar.getInstance();
日历.set(year,month-1,1);
int 星期几=日历.get(Calendar.DAY_OF_WEEK)-1;
int day=0;
if(month==1||month==3||month==5||month==7||month==8||month==10||month==12)
{ day=31;
}
if(month==4||month==6||month==9||month==11)
{ day=30;
}
if(month==2)
{ if(((year%4==0)&&(year%100!=0))||(year%400==0))
{ day=29;
}
else
{ day=28;
}
}
nextDay=1;
for(int k=0;k<6;k++)
{ if(k==0)
for(int j=星期几;j<7;j++)
{ a[k][j]=" "+nextDay ;
nextDay++;
}
else
for(int j=0;j<7&&nextDay<=day;j++)
{ a[k][j]=""+nextDay ;
nextDay++;
}
}
return a;
}
}
CalenderFrame.java
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class CalenderFrame extends JFrame implements ActionListener
{ JTable table;
Object name[]={"星期日","星期一","星期二","星期三", "星期四","星期五","星期六"};
JButton nextMonth,previousMonth;
int year=2006,month=5;
CalendarBean calendar;
String rili[][];
JLabel showMessage=new JLabel("",JLabel.CENTER);
JScrollPane scroll;
public CalenderFrame()
{ calendar=new CalendarBean();
calendar.setYear(year);
calendar.setMonth(month);
rili=calendar.getCalendar();
【代码1】 //使用数组rili和name创建table
table.setRowSelectionAllowed(false);
nextMonth=new JButton("下月");
previousMonth=new JButton("上月");
nextMonth.addActionListener(this);
previousMonth.addActionListener(this);
JPanel pNorth=new JPanel(),
pSouth=new JPanel();
pNorth.add(previousMonth);
pNorth.add(nextMonth);
pSouth.add(showMessage);
showMessage.setText("日历："+calendar.getYear()+"年"+calendar.getMonth()+
"月" );
scroll=new JScrollPane(table);
add(scroll,BorderLayout.CENTER);
add(pNorth,BorderLayout.NORTH);
add(pSouth,BorderLayout.SOUTH);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100,100,400,240);
setVisible(true);
validate();
}
public void actionPerformed(ActionEvent e)
{ if(e.getSource()==nextMonth)
{ month=month+1;
if(month>12)
month=1;
calendar.setMonth(month);
rili=calendar.getCalendar();
remove(scroll);
【代码2】 //使用数组rili和name创建table
table.setRowSelectionAllowed(false);
scroll=new JScrollPane(table);
add(scroll,BorderLayout.CENTER);
}
else if(e.getSource()==previousMonth)
{ month=month-1;
if(month<1)
month=12;
calendar.setMonth(month);
rili=calendar.getCalendar();
remove(scroll);
【代码3】 //使用数组rili和name创建table
table.setRowSelectionAllowed(false);
scroll=new JScrollPane(table);
add(scroll,BorderLayout.CENTER);
}
showMessage.setText("日历："+calendar.getYear()+"年"+calendar.getMonth()+"月" );
}
}
CalendarMainClass.java
public class CalendarMainClass
{ public static void main(String args[])
{ new CalenderFrame();
}
}
实验3 多文档界面（MDI）
1．答案：
【代码1】： new JDesktopPane();
【代码2】： desk.getAllFrames();
【代码3】： desk.setLayer(a[i],JDesktopPane.DEFAULT_LAYER);
【代码4】： desk.add(newInternalFrame,JDesktopPane.DRAG_LAYER);
2．模板代码
MDIExample.java
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
class MyInternalFrame extends JInternalFrame
{ JTextArea text;
MyInternalFrame(String title)
{ super(title,true,true,true,true);
text=new JTextArea();
Container con=getContentPane();
con.add(new JScrollPane(text),BorderLayout.CENTER);
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
addInternalFrameListener(new InternalFrameAdapter ()
{ public void internalFrameActivated(InternalFrameEvent e)
{ setLayer(JDesktopPane.DRAG_LAYER);
}
public void internalFrameDeactivated(InternalFrameEvent e)
{ setLayer(JDesktopPane.DEFAULT_LAYER);
}
});
}
public JTextArea getJTextArea()
{ return text;
}
}
class Mywindow extends JFrame implements ActionListener
{ JDesktopPane desk;
JMenuBar menubar;
JMenu menu;
JMenuItem itemNew,itemCopy,itemCut,itemPaste;
Container con;
Mywindow()
{ setSize(360,360);
setVisible(true);
con=getContentPane();
desk=【代码1】 //创建JdesktopPane对象。
desk.setDesktopManager(new DefaultDesktopManager());
con.add(desk,BorderLayout.CENTER);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
menubar=new JMenuBar();
menu=new JMenu("编辑");
itemNew=new JMenuItem("新建");
itemCopy=new JMenuItem("拷贝");
itemCut=new JMenuItem("剪切");
itemPaste=new JMenuItem("粘贴");
itemNew.addActionListener(this);
itemCopy.addActionListener(this);
itemCut.addActionListener(this);
itemPaste.addActionListener(this);
menu.add(itemNew);
menu.add(itemCopy);
menu.add(itemCut);
menu.add(itemPaste);
menubar.add(menu);
setJMenuBar(menubar);
validate();
}
public void actionPerformed(ActionEvent e)
{ if(e.getSource()==itemNew)
{ JInternalFrame a[]=【代码2】//desk返回其中的全部内部窗体
for(int i=0;i<a.length;i++)
{ 【代码3】 //desk 将a[i]放置在DEFAULT_LAYER层
}
JInternalFrame newInternalFrame=new MyInternalFrame("无标题");
newInternalFrame.setBounds(10,10,300,300);
newInternalFrame.setVisible(true);
【代码4】 //desk 将newInternalFrame放置在DRAG_LAYER层
desk.validate();
con.validate();
this.validate();
}
if(e.getSource()==itemCopy)
{ MyInternalFrame internalFrame=(MyInternalFrame)desk.getSelectedFrame();
JTextArea text=internalFrame.getJTextArea();
text.copy();
}
else if(e.getSource()==itemCut)
{ MyInternalFrame internalFrame=(MyInternalFrame)desk.getSelectedFrame();
JTextArea text=internalFrame.getJTextArea();
text.cut();
}
else if(e.getSource()==itemPaste)
{ MyInternalFrame internalFrame=(MyInternalFrame)desk.getSelectedFrame();
JTextArea text=internalFrame.getJTextArea();
text.paste();
}
}
}
public class MDIExample
{ public static void main(String args[])
{ Mywindow win=new Mywindow();
}
}