（含图）public class Java_1{

public static void main(String args[]) {

byte b = 10; // 二进制表示00001010

/*********Fill********/

byte c = ____________;

b = (byte)(b ^ c);

/*********Fill********/

System.out.println("b的结果是：" ________________);

}

}

（含图）//程序的功能是从1开始，每秒打印一个递增的整数。

import java.awt.*;

import java.awt.event.*;

import java.util.*;

import javax.swing.*;

import javax.swing.Timer;

public class Java_3{

public static void main(String[] args){

ActionListener listener = new TimePrinter();

/*********Fill********/

Timer t = new Timer(1000, _____________);

t.start();

JOptionPane.showMessageDialog(null, "退出程序?");

System.exit(0);

}

}

/*********Fill********/

class TimePrinter implements ______________________{

/*********Fill********/

public void action________________(ActionEvent event){

i++;

System.out.println(i);

Toolkit.getDefaultToolkit().beep();

}

int i = 0;

}

（含图）

（含图）

/*********Fill********/

import javax._______________.JOptionPane;

public class Java_1 {

public static void main( String args[] ){

String firstNumber, //存储输入第1个整数的字符串

secondNumber; //存储输入第2个整数的字符串

int number1, // first number to add

number2, // second number to add

sum; // sum of number1 and number2

//输入第1个整数作为字符串存储

firstNumber = JOptionPane.showInputDialog( "请输入第1个整数" );

//输入第2个整数作为字符串存储

secondNumber = JOptionPane.showInputDialog( "请输入第2个整数" );

//将字符串转换为整数int型

/*********Fill********/

number1 = Integer.parseInt( _________________ );

/*********Fill********/

number2 = Integer.parseInt( _________________ );

/*********Fill********/

__________ = number1 + number2;

//显示结果

JOptionPane.showMessageDialog(

null, "两个数之和: " + sum, "两个整数之和的结果.",

JOptionPane.PLAIN_MESSAGE);

System.exit( 0 );

}

}

（含图）import javax.swing.JOptionPane;

public class Java_1{

public static void main( String args[] ){

String s1, s2, s3, s4, output;

s1 = new String( "hello" );

s2 = new String( "good bye" );

s3 = new String( "Happy Birthday" );

s4 = new String( "happy birthday" );

output = "s1 = " + s1 + "\ns2 = " + s2 +

"\ns3 = " + s3 + "\ns4 = " + s4 + "\n\n";

//测试字符串相等

if ( s1.equals( "hello" ) )

/*********Fill********/

output = output + "_________________________";

else

output = output + "s1 does not equal \"hello\"\n";

//用==测试相等

if ( s1 == "hello" )

output += "s1 equals \"hello\"\n";

else

output += "s1 does not equal \"hello\"\n";

//忽略字符格式测试相等

if ( s3.equalsIgnoreCase( s4 ) )

output += "s3 equals s4\n";

else

output += "s3 does not equal s4\n";

//内容比较

output +=

"\ns1.compareTo( s2 ) is " + s1.compareTo( s2 ) +

"\ns2.compareTo( s1 ) is " + s2.compareTo( s1 ) +

"\ns1.compareTo( s1 ) is " + s1.compareTo( s1 ) +

"\ns3.compareTo( s4 ) is " + s3.compareTo( s4 ) +

"\ns4.compareTo( s3 ) is " + s4.compareTo( s3 ) +

"\n\n";

//测试包含字符格式的域匹配

if ( s3.regionMatches( 0, s4, 0, 5 ) )

output += "First 5 characters of s3 and s4 match\n";

else

output +=

"First 5 characters of s3 and s4 do not match\n";

//忽略字符格式的域匹配

if ( s3.regionMatches( true, 0, s4, 0, 5 ) )

output += "First 5 characters of s3 and s4 match";

else

output +=

"First 5 characters of s3 and s4 do not match";

/*********Fill********/

JOptionPane.______________________( null, output,

"字符串构造方法示例",

JOptionPane.INFORMATION_MESSAGE );

System.exit( 0 );

}

}

（含图）import java.awt.*;

import javax.swing.*;

public class Java_3{

public static void main(String[] args){

BeijingFrame frame = new BeijingFrame();

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.show();

}

}

/*********Fill********/

class _________________ extends JFrame{

public BeijingFrame(){

setTitle("Welcome to Beijing");

Container contentPane = getContentPane();

BeijingPanel panel = new BeijingPanel();

contentPane.add(panel);

pack();

}

}

class BeijingPanel extends JPanel{

public BeijingPanel(){

/*********Fill********/

setLayout(new _______________ );

ImageIcon icon = new ImageIcon("tiantan.jpg");

/*********Fill********/

jLC = new JLabel( _______________ );

add(jLC, BorderLayout.CENTER);

lpanel = new JPanel();

jLS = new JLabel("The Temple of Heaven");

lpanel.add(jLS);

add(lpanel, BorderLayout.SOUTH);

}

private JLabel jLC;

private JLabel jLS;

private JPanel panel;

private JPanel lpanel;

}

（含图）

import java.io.*;

public class Java_1

{

public static void main(String args[])

{

/**********FILL**********/

_____________________ s;

/**********FILL**********/

_____________________

for ( int i = 1; i <= 15 ;i++)

/**********FILL**********/

s *= _____________________ ;

System.out.println(" 15 ! = " + s );

}

}

（含图）/*********Fill********/

public class Java_2 _______________{

private String sThreadName;

public static void main(String argv[]){

Java_2 first = new Java_2("first");

/*********Fill********/

first._________;

Java_2 second = new Java_2("second");

/*********Fill********/

second._________;

}

/*********Fill********/

___________(String s){

sThreadName = s;

}

public String getThreadName(){

return sThreadName;

}

public void run(){

for(int i = 0; i < 4; i ++){

/*********Fill********/

System.out.println(_________________+i);

try{

Thread.sleep(100);

} catch(InterruptedException e){

System.out.println(e.getMessage());

}

}

}

}

（含图）import javax.swing.*;

import java.awt.event.*;

import java.io.*;

import java.awt.*;

public class Java_3 implements ActionListener

{

private JFrame frame;

private JButton button;

private JButton saveButton;

private JTextArea textArea;

private JFileChooser dia;

private JPanel buttonPanel;

public void initGUI()

{

/*********Fill********/

frame=new JFrame("_____________________");

button=new JButton("open file");

button.setActionCommand("open");

button.addActionListener(this);

/*********Fill********/

saveButton=new JButton("______________________");

saveButton.setActionCommand("save");

saveButton.addActionListener(this);

textArea=new JTextArea("",10,10);

buttonPanel=new JPanel();

dia=new JFileChooser();

frame.addWindowListener(new WindowAdapter()

{

public void windowClosing(WindowEvent e)

{

System.exit(0);

}

});

buttonPanel.add(button);

buttonPanel.add(saveButton);

frame.getContentPane().add(buttonPanel,BorderLayout.NORTH);

frame.getContentPane().add(textArea,BorderLayout.CENTER);

frame.setSize(300,300);

frame.setVisible(true);

}

public void actionPerformed(ActionEvent event)

{

if(event.getActionCommand().equals("open"))

{

//打开文件?

/*********Fill********/

dia.showOpenDialog( _____________________ );

dia.setVisible(true);

File file=dia.getSelectedFile();

String fileName=file.getAbsolutePath();

textArea.append("path of selected file: "+fileName+"\r\n");

}

else if(event.getActionCommand().equals("save"))

{

//保存文件

dia.showSaveDialog(frame);

dia.setVisible(true);

File file=dia.getSelectedFile();

String fileName=file.getAbsolutePath();

textArea.append("path of saved file: "+fileName+"\r\n");

}

}

public static void main(String args[])

{

Java_3 example=new Java_3();

example.initGUI();

}

}

（含图）import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

/**********FILL**********/

public class Java_2 ____________ JFrame implements ActionListener{

public static void main(String args[]){

Java_2 fr = new Java_2("Hello !");

fr.setSize(200,100);

JButton b = new JButton("确定");

/**********FILL**********/

b._____________________(new Java_2());

fr.getContentPane().add(b);

fr.setVisible(true);

}

/**********FILL**********/

public void actionPerformed(______________ e){

System.exit(0);

}

/**********FILL**********/

public Java_2(________________){

super(str);

}

public Java_2(){

}

}

（含图）public class Java_1 {

public static void main(String args[]) {

int x = 4;

/*********Fill********/

System.out.println("x的值是：" +(x _____________ 4 ? 9.0 : 99.99));

}

}

abstract class P{

P(){ System.out.println("P"); }

abstract void goo(); }

class A extends P{

A(){ super(); }

void goo() { System.out.println("A"); }

void foo() { System.out.println("F"); }

}

class B extends P{

void goo() { System.out.println("B"); }

void koo(){ System.out.println("K"); }

}

public class T23 {

public static void main(String[] args) {

A a=new A();

a.goo();

a.foo();

B b=new B();

b.koo();

}

}

import java.awt.event.* ;

/**********FILL**********/

public class Java_3 ________________ ActionListener

{

    public static void main(String args[ ])

    {

        Java_3 tb = new Java_3();

/**********FILL**********/

        Frame f = new Frame("________________");

        f.setSize(200,100);

        f.setLayout(new FlowLayout(FlowLayout.CENTER));

        Button b = new Button("Press the Button!");

/**********FILL**********/

        b.____________________________(tb);

/**********FILL**********/

        _________________.add(b);

        f.addWindowListener(new WindowAdapter(){

              public void windowClosing(WindowEvent e){

                 System.exit(0);

              }

        });

        f.setVisible(true) ;

    }

/**********FILL**********/

    public void _______________________(ActionEvent e)

    {

        Frame fr = new Frame("An Other");

        fr.setBackground(Color.green);

        fr.add(new Label("This frame shows when "+"pressing the button in Button Test"));

        fr.addWindowListener(new WindowAdapter(){

           public void windowClosing(WindowEvent e){

              System.exit(0);

           }

        });

        fr.pack();

        fr.setVisible(true) ;

    }

}

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class Java_3{

public static void main(String[] args){

ButtonFrame frame = new ButtonFrame();

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.show();

}

}

/**********FILL**********/

class _______________ extends JFrame{

public ButtonFrame(){

setTitle("测试按钮");

setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);

ButtonPanel panel = new ButtonPanel();

Container contentPane = getContentPane();

contentPane.add(panel);

}

public static final int DEFAULT_WIDTH = 200;

public static final int DEFAULT_HEIGHT = 100;

}

class ButtonPanel extends JPanel{

public ButtonPanel(){

JButton yellowButton = new JButton("黄色");

add(yellowButton);

ColorAction yellowAction = new ColorAction(Color.YELLOW);

yellowButton.addActionListener(yellowAction);

}

/**********FILL**********/

private class ColorAction implements ___________________{

public ColorAction(Color c){

backgroundColor = c;

}

/**********FILL**********/

public void ____________________(ActionEvent event){

setBackground(backgroundColor);

}

private Color backgroundColor;

}

}

import java.io.*;

public class Java_3{

public static int data[]={32,18,41,23,2,56,36,67,59,20};

public static void main(String args[]){

int i;

/*********Fill********/

int index=data.__________________;

System.out.println("排序前:");

for(i=0;i<index;i++)

System.out.print(" "+data[i]+" ");

System.out.println();

/*********Fill********/

BubbleSort( _________________ );

System.out.println("排序后:");

for(i=0;i<index;i++)

System.out.print(" "+data[i]+" ");

System.out.println();

}

// 冒泡法排序

public static void BubbleSort(int index){

int i,j;

int temp;

for(j=1;j<index;j++){

for(i=index-1;i>=j;i--){

if(data[i]<data[i-1]){ //比较相邻的两个数

temp=data[i];

data[i]=data[i-1];

/*********Fill********/

data[i-1]= __________________ ;

}

}

}

}

}

import java.awt.*;

/*********Fill********/

import java.________________.event.*;

public class Java_3 implements ActionListener,WindowListener

{

Frame f;

Button be,bw,bs,bn,bc;

public void create()

{

f=new Frame("Exit test");

be=new Button("East");

bw=new Button("West");

bs=new Button("South");

bn=new Button("North");

/*********Fill********/

bc=new Button(________________);

f.add(be,"East");

f.add(bw,"West");

f.add(bs,"South");

/*********Fill********/

f.add(bn,________________);

f.add(bc,"Center");

/*********Fill********/

bc.addActionListener(________________); //为按钮注册监听器

/*********Fill********/

f.addWindowListener(________________); //为按钮注册监听器

f.setSize(200,200);

f.setVisible(true);

}

public static void main(String args[])

{

Java_3 fa=new Java_3();

fa.create();

}

public void actionPerformed(ActionEvent e)

{

System.exit(0); //实现窗口关闭功能

};

public void windowOpened(WindowEvent e){}

public void windowClosing(WindowEvent e)

{

System.exit(0); //实现窗口关闭功能

};

public void windowClosed(WindowEvent e){}

public void windowIconified(WindowEvent e){}

public void windowDeiconified(WindowEvent e){}

public void windowActivated(WindowEvent e){}

public void windowDeactivated(WindowEvent e){}

}

/*********Fill********/

public class Java_2 ___________________{

private int x=0;

private int y=0;

public static void main(String[]args){

Java_2 r = new Java_2();

/*********Fill********/

Thread t = new Thread( ___________________ );

t.start();

}

public void run() {

/*********Fill********/

int ___________________ = 0;

for(;;){

x++;

/*********Fill********/

___________________;

k++;

if (k>5) break;

System.out.println("x=" + x + ",y ="+ y);

}

}

}

public class Java_3{

public static void main(String[] args) {

String text = "Beijing, the Capital City, is the political,"

+ "cultural and diplomatic centre of China. It has"

+ "become a modern international cosmopolitan city"

+ "with more than 11 million people. The Capital"

+ "International Airport, 23.5 km from the city centre,"

+ "is China's largest and most advanced airport.";

int vowels = 0 ;

/*********Fill********/

int _____________ = text.length();

for(int i = 0; i < textLength; i++) {

/*********Fill********/

char ch = Character.toLowerCase(text.__________);

if(ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u') {

/*********Fill********/

____________;

}

}

System.out.println("The text contained vowels: " + vowels + "\n" );

}

}

import java.awt.*;

import java.applet.*;

/*********Fill********/

public class Java_2 extends _______________________

{

TextArea outputArea;

public void init()

{

setLayout(new BorderLayout());

outputArea = new TextArea();

/*********Fill********/

____________________( outputArea );

// 计算0至10的阶乘

for ( long i = 0; i <= 10; i++ )

outputArea.append(i + "! = " + factorial( i ) + "\n" );

}

// 用递归定义阶乘方法

public long factorial( long number )

{

if ( number <= 1 ) // 基本情况

return 1;

else

return number * factorial( number - 1 );

}

}

public class Java_2

{

public static void main(String[] args) {

int[][] aMatrix = {{1,1,1,1,1},{2,2,2,2,2},{3,3,3,3,3},{4,4,4,4,4}};

int i = 0; //循环变量

int j = 0; //循环变量

//print matrix

for (i = 0; i < aMatrix.length; i++) {

/*********Fill********/

for ( j = 0; __________________ ; j++) {

/*********Fill********/

System.out.print(__________________ + " ");

}

System.out.println();

}

}

}

public class Java_2 {

public static void main(String[ ] args) {

Point pt;

/*********Fill********/

pt = _____________ Point(2, 3);

System.out.println(pt);

}

}

class Point {

/*********Fill********/

private _____________;

private int y;

/*********Fill********/

public _____________ (int a, int b) {

x = a;

y = b;

}

int getX( ) {

return x;

}

int getY( ) {

return y;

}

void setX(int a) {

x = a;

}

void setY(int b) {

y = b;

}

/*********Fill********/

public String _____________ ( ) {

return "( " + x + "," + y + " ) ";

}

}