import java.awt.event.*;
public class Java_2 extends Frame { public Java_2(String s){ super(s); } public static void main(String args[]){ Java_2 fr = new Java_2(\ Button b=new Button(\ //*********Found********
b.addActionListener(_new HandleButton()_____); fr.add(b); fr.pack();
//*********Found********
fr.addWindowListener(new _WindowAdapter_____(){ public void windowClosing(WindowEvent e) { System.exit(0); } }); fr.setVisible(true); } }
class HandleButton implements ActionListener{ public void actionPerformed(ActionEvent e){ System.out.println(\ } }
3. //*********Found******** import javax.swing______.*;
public class Java_3 {
public static void main( String args[] ) {
String s1, s2, s3, s4, output;//声明5个字符串引用 //初始化字符串
s1 = new String( \您好！\ s2 = new String( \您好！\ // 判别字符串相同否 if (s1 == s2 )
output =
\和 s2 是内存中同一个对象\ else
output =
\和 s2 不是内存中同一个对象\ //判别字符串内容相等否 //*********Found******** if (s1.equals(s2)______ )
output += \和 s2内容相等\ else
output += \和s2 内容不相等are not equal\
// 用intern()方法来获得与对象s1，s2内容都是\您好！\字符串的引用s3 和 s4 //*********Found******** s3 = s1__.intern()____; //*********Found******** s4 = s2__.intern()_____;
//判别s3和s4是否是内存中相同的对象 if ( s3 == s4 ) output +=
\和s4 是内存中同一个对象\ else
output +=
\和 s4 不是内存中同一个对象\
//判别s1和s3是否引用同一个对象 if ( s1 == s3 ) output +=
\和s3是内存中同一个对象\ else
output +=
\和s3不是内存中同一个对象\
// 判别s2和s4是否是内存中相同的对象 if ( s2 == s4 ) output +=
\和s4是内存中同一个对象\ else
output +=
\和s4不是内存中同一个对象\ //判别s1和s4是否是内存中同一个对象 if ( s1 == s4 )
output +=
\和s4是内存中同一个对象\ else
output +=
\和s4不是内存中同一个对象\
JOptionPane.showMessageDialog( null, output, //*********Found******** \示范
String的intern（）方法_____\
JOptionPane.INFORMATION_MESSAGE );
System.exit( 0 ); } }
第四套：
1．import javax.swing.JApplet; // import class JApplet import java.awt.Graphics; // import class Graphics
public class Java_1 extends JApplet {
//*********Found********
public void paint( _Graphics_____ g ) {
g.drawString( \欢迎你参加Java考试!\ } }
2. import java.io.*; public class Java_2 {
public static void main(String[] args) throws IOException {
File inputFile; File outputFile; FileInputStream in; FileOutputStream out; int c;
inputFile = new File(\ outputFile = new File(\ in = new FileInputStream(inputFile); //*********Found********
__out = new FileOutputStream____(outputFile);
while ((c = in.read()) != -1) //*********Found******** _ out.write(c)_____;
in.close(); out.close(); } }
3. import javax.swing.JOptionPane;
public class Java_3 {
public static void main( String args[] ) {
String firstNumber, // 用户输入第1个字符串 secondNumber, // 用户输入第2个字符串 result; // a string containing the output int number1, // 比较的第1个数 number2; // 比较的第2个数
//读用户输入的第1个字符串 read first number from user as a string firstNumber =
JOptionPane.showInputDialog( \
//读用户输入的第2个字符串read second number from user as a string secondNumber =
JOptionPane.showInputDialog( \
// 将字符串类型转换成整数类型
number1 = Integer.parseInt( firstNumber ); number2 = Integer.parseInt( secondNumber ); result = \
//*********Found******** if ( number1 = number2 )
result = number1 + \
if ( number1 != number2 )
result = number1 + \
if ( number1 < number2 )
result = result + \
if ( number1 > number2 )
result = result + \
if ( number1 <= number2 )
result = result + \
//*********Found******** if (; number1 >= number2 )
result = result + \
//显示结果
//*********Found********
_JOptionPane.showMessageDialog_____( null, result, \比较结果 \ //*********Found********
_JOptionPane._____INFORMATION_MESSAGE );
//程序正常退出
//*********Found******** __ System.exit(0)____; } }
第五套:
1. import javax.swing.JApplet; import java.awt.Graphics;
//*********Found********
public class Java_1 extends __JApplet____ { public void paint( Graphics g ) {
g.drawString( \欢迎你来参加\ g.drawString( \语言考试!\ } }
2. import java.awt.* ; import java.applet.* ;
public class Java_2 extends Applet {