二级java考试真题(1)(3)

String s;

public void init(){

//*********Found********

s = getParameter(_\____); }

public void paint(Graphics g){ g.drawString(s,20,20); } }

3. import javax.swing.*;

//*********Found******** import __ java.text___.*;

public class Java_3 {

public static void main( String args[] ) {

//*********Found********

SimpleTime t = new _ SimpleTime_____ ( 12, 30, 19 );

//*********Found********

_ JOptionPane.showMessageDialog_____( null, t.buildString(), \ //*********Found********

__JOptionPane____.INFORMATION_MESSAGE );

System.exit( 0 ); } }

class SimpleTime {

private int hour, minute, second;

public SimpleTime( int hour, int minute, int second ) {

this.hour = hour;

//*********Found********

__this.minute____ = minute; this.second = second; }

public String buildString() {

//*********Found********

return \this.toString()_____ + \

\ this; }

public String toString() {

DecimalFormat twoDigits = new DecimalFormat( \

return twoDigits.format( this.hour ) + \ twoDigits.format( this.minute ) + \ twoDigits.format( this.second ); } }

第六套：

1．public class Java_1 {

public static void main(String args[]) {

final char chrA='A'; char chrDisplay;

//*************Found********** for(int i=0;i<=25_____;i++)

{

//************Found************ chrDisplay=_(char)____(chrA+i); System.out.print(chrDisplay) ; } } }

2. import java.applet.*; import java.awt.event.*;

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

public class Java_2 extends Applet { private String strCaption; public void init() {

strCaption=\

//************Found*****************

strCaption=this.__ getParameter____(\

//加入一个按钮

Button btnDisp=new Button(\显示参数\ this.add(btnDisp) ;

//事件监听

btnDisp.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

//***************Found***************** JOptionPane._

showMessageDialog_____(null,\

参数为:\ } }) ; } }

3. import javax.swing.*; import java.awt.event.*; import java.awt.*; public class Java_3 {

public static void main(String args[]) {

Frame frame=new Frame(\全国计算机等级考试\ frame.setLayout(new FlowLayout()) ;

final TextField txt=new TextField(\二级Java等级考试\ frame.add(txt) ;

Button btn=new Button(\新内容\ frame.add(btn);

btn.addActionListener(new ActionListener()

Caption的值

{

public void actionPerformed(ActionEvent e) {

String strNew;

//***********Found***************

strNew=JOptionPane.__ showInputDialog____(\输入新的字符串\ //***********Found*************** //将新字符串内容在txt中显示出来 txt.__ setText____(strNew) ; } }) ;

Button btnSel=new Button(\选中前三个字符\ frame.add(btnSel) ;

btnSel.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

//*************Found************** //选中前三个字符

_txt.select(0,3) _____;

txt.requestFocus(); } });

frame.addWindowListener(new WindowAdapter() {

public void windowClosing(WindowEvent e) {

System.exit(0) ; } }) ;

frame.setSize(300,100) ; frame.setVisible(true) ; } }

第七套:

1. public class Java_1 {

public static void main(String args[]) { int a=9,b=5,c=7,t;

//*********Found**********

if(a>b){ t=a; a=b; __b=t____;} if(a>c){ t=a; a=c; c=t;}

//*********Found********** if(_b>c_____){ t=b; b=c; c=t;}

System.out.println(\ } }

2. import java.util.*; import java.io.*; public class Java_2 {

public static void main(String args[]) {

int a,b,c;

Random r=new Random();

for(int i=0;i<3200;i++) {

try {

//*************Found**************** a=r._ nextInt______() ; //得到一个随机数 //*************Found**************** b=r.___ nextInt_____() ; //得到一个随机数 c=a/b; }

//*************Found**************** __

catch___(Exception e)

{

System.out.println(\不能被零除!\ c=0; }

System.out.println(\结果为:\ }

} }

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

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