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全国计算机等级考试——二级JAVA完整大题题库【五十三道】

全国计算机等级考试——二级JAVA完整大题题库【五十三道】

全国计算机等级考试二级 JAVA

题目内容

编写于2023.04.10

分为40道选择题和3道大题（大题是程序填空类型）
其中选择题只能进去做一次，一旦退出来则不可再进（注意！）。大题可以重复进入，重复做。

分值：
选择题一个四十道题四十分，一题一分
三道大题：
基础操作：18分
简单应用：24分
综合应用：18分

大题得在位于//*Found下的 一行 ，只在该行的横线位置进行操作填写，文章最后有示例，以及 53 * 3 道大题资源。
注：获取证书的条件为：1.总分达到60及以上；2.四十个选择题必须答对二十个及以上，两者条件都满足方可获证

考试界面

选择题

在这里插入图片描述
在这里插入图片描述

大题

大题打开一般选用记事本打开即可
在这里插入图片描述
在这里插入图片描述
在这里插入图片描述

资源

由于选择题过多懒得弄了，可以去其他地方（知乎，牛客网，小红书，csdn等地方）自己找了刷一下，都是些基础的，对有基本功扎实的，很简单。和大学学java然后考的那种选择题差不多，实在找不到可以找找平时大学考试的JAVA选择题题库（百度直接搜搜看看就行），注意：选择题一个四十个必须答对二十个，不然就算你考总分超过60也不及格的

百度网盘：
链接：https://pan.baidu.com/s/1TSrVCTgrz7AMrAPPm5dzoQ?pwd=grxd 
提取码：grxd （2025-04-20 更新）

阿里网盘：

全国计算机等级考试——二...题库【五十三道】

https://www.aliyundrive.com/s/PieCRcn6BHE


失效了评论区联系


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示例：

在这里插入图片描述
程序填空位置位于//*Found下的一行，只在该行的横线位置进行操作填写
给你们的题库全部是带答案的，这是不带答案的样子的示例

import javax.swing.JOptionPane;  //导入JOptionPane类

public class Java_1 {

public static void main( String args[] )

{

//Found

____________________________________(

null, "欢迎\n你\n参加\nJava\n考试!" );

System.exit( 0 );  // 结束程序

}

}

/ JOptionPane类的常用静态方法如下：

showInputDialog()

showConfirmDialog()

showMessageDialog()

showOptionDialog()

*/


java运行
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基础操作

在这里插入图片描述

import javax.swing.JOptionPane;  //导入JOptionPane类

public class Java_1 {

public static void main( String args[] )

{

//Found

JOptionPane.showMessageDialog(

null, "欢迎\n你\n参加\nJava\n考试!" );

System.exit( 0 );  // 结束程序

}

}

/ JOptionPane类的常用静态方法如下：

showInputDialog()

showConfirmDialog()

showMessageDialog()

showOptionDialog()

*/


java运行
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简单运用

在这里插入图片描述

import java.util.Random;

public class Java_2

{

public static void main(String args[]){

Random random = new Random();

float x = random.nextFloat();//产生0.0与1.0之间的一个符点数

int n = Math.round(20x);  //构造20以内的一个整数

long f = 1 ;  //保存阶乘的结果

int k = 1 ;  //循环变量

//Found

do{f=k;

k++;

//Found

}while(k<=n);

System.out.println(n+"!= "+f);

}

}


java运行
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综合应用

在这里插入图片描述

import java.text.DecimalFormat;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

 <span class="token comment">//*********Found********</span>



public class Java_3 extends JFrame implements ActionListener {

private JTextField input1, input2, output;

private int number1, number2;

private double result;


// 初始化

public Java_3()

{

//*Found

super( "示范异常" );


  <span class="token class-name">Container</span> c <span class="token operator">=</span> <span class="token function">getContentPane</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
  c<span class="token punctuation">.</span><span class="token function">setLayout</span><span class="token punctuation">(</span> <span class="token keyword">new</span> <span class="token class-name">GridLayout</span><span class="token punctuation">(</span> <span class="token number">3</span><span class="token punctuation">,</span> <span class="token number">2</span> <span class="token punctuation">)</span> <span class="token punctuation">)</span><span class="token punctuation">;</span>

  c<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span> <span class="token keyword">new</span> <span class="token class-name">JLabel</span><span class="token punctuation">(</span> <span class="token string">"输入分子"</span><span class="token punctuation">,</span>
                     <span class="token class-name">SwingConstants</span><span class="token punctuation">.</span>RIGHT <span class="token punctuation">)</span> <span class="token punctuation">)</span><span class="token punctuation">;</span>
  input1 <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">JTextField</span><span class="token punctuation">(</span> <span class="token number">10</span> <span class="token punctuation">)</span><span class="token punctuation">;</span>
  c<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span> input1 <span class="token punctuation">)</span><span class="token punctuation">;</span>

  c<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span>
     <span class="token keyword">new</span> <span class="token class-name">JLabel</span><span class="token punctuation">(</span> <span class="token string">"输入分母和回车"</span><span class="token punctuation">,</span>
                 <span class="token class-name">SwingConstants</span><span class="token punctuation">.</span>RIGHT <span class="token punctuation">)</span> <span class="token punctuation">)</span><span class="token punctuation">;</span>
  input2 <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">JTextField</span><span class="token punctuation">(</span> <span class="token number">10</span> <span class="token punctuation">)</span><span class="token punctuation">;</span>
  c<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span> input2 <span class="token punctuation">)</span><span class="token punctuation">;</span>
  input2<span class="token punctuation">.</span><span class="token function">addActionListener</span><span class="token punctuation">(</span> <span class="token keyword">this</span> <span class="token punctuation">)</span><span class="token punctuation">;</span>

  c<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span> <span class="token keyword">new</span> <span class="token class-name">JLabel</span><span class="token punctuation">(</span> <span class="token string">"计算结果"</span><span class="token punctuation">,</span> <span class="token class-name">SwingConstants</span><span class="token punctuation">.</span>RIGHT <span class="token punctuation">)</span> <span class="token punctuation">)</span><span class="token punctuation">;</span>
  output <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">JTextField</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
  c<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span> output <span class="token punctuation">)</span><span class="token punctuation">;</span>

  <span class="token function">setSize</span><span class="token punctuation">(</span> <span class="token number">425</span><span class="token punctuation">,</span> <span class="token number">100</span> <span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token function">show</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>



}


//处理 GUI 事件

public void actionPerformed( ActionEvent e )

{

DecimalFormat precision3 = new DecimalFormat( "0.000" );


  output<span class="token punctuation">.</span><span class="token function">setText</span><span class="token punctuation">(</span> <span class="token string">""</span> <span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">// 空的JTextField输出</span>

 <span class="token comment">//*********Found********</span>
  <span class="token keyword">try</span><span class="token punctuation">{<!-- --></span>         
     number1 <span class="token operator">=</span> <span class="token class-name">Integer</span><span class="token punctuation">.</span><span class="token function">parseInt</span><span class="token punctuation">(</span> input1<span class="token punctuation">.</span><span class="token function">getText</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">)</span><span class="token punctuation">;</span>
     number2 <span class="token operator">=</span> <span class="token class-name">Integer</span><span class="token punctuation">.</span><span class="token function">parseInt</span><span class="token punctuation">(</span> input2<span class="token punctuation">.</span><span class="token function">getText</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">)</span><span class="token punctuation">;</span>

     result <span class="token operator">=</span> <span class="token function">quotient</span><span class="token punctuation">(</span> number1<span class="token punctuation">,</span> number2 <span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token comment">//*********Found********</span>
     output<span class="token punctuation">.</span><span class="token function">setText</span><span class="token punctuation">(</span>precision3<span class="token punctuation">.</span><span class="token function">format</span><span class="token punctuation">(</span>result<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
  <span class="token keyword">catch</span> <span class="token punctuation">(</span> <span class="token class-name">NumberFormatException</span> nfe <span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
     <span class="token class-name">JOptionPane</span><span class="token punctuation">.</span><span class="token function">showMessageDialog</span><span class="token punctuation">(</span> <span class="token keyword">this</span><span class="token punctuation">,</span>
        <span class="token string">"你必须输入两个整数"</span><span class="token punctuation">,</span>
        <span class="token string">"非法数字格式"</span><span class="token punctuation">,</span>
        <span class="token class-name">JOptionPane</span><span class="token punctuation">.</span>ERROR_MESSAGE <span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
  <span class="token keyword">catch</span> <span class="token punctuation">(</span> <span class="token class-name">Exception</span> dbze <span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
 <span class="token comment">//*********Found********</span>
     <span class="token class-name">JOptionPane</span><span class="token punctuation">.</span><span class="token function">showMessageDialog</span><span class="token punctuation">(</span> <span class="token keyword">this</span><span class="token punctuation">,</span> 
        <span class="token string">"除法异常"</span><span class="token punctuation">,</span>
        <span class="token string">"除数为零"</span><span class="token punctuation">,</span>
        <span class="token class-name">JOptionPane</span><span class="token punctuation">.</span>ERROR_MESSAGE <span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span>



}


// 定义求商的方法，如遇除数为零时，能抛出异常。

public double quotient( int numerator, int denominator )

throws Exception

{

if ( denominator == 0 )

throw new Exception();


  <span class="token keyword">return</span> <span class="token punctuation">(</span> <span class="token keyword">double</span> <span class="token punctuation">)</span> numerator <span class="token operator">/</span> denominator<span class="token punctuation">;</span>



}


public static void main( String args[] )

{

Java_3 app = new Java_3();


  app<span class="token punctuation">.</span><span class="token function">addWindowListener</span><span class="token punctuation">(</span>
     <span class="token keyword">new</span> <span class="token class-name">WindowAdapter</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{<!-- --></span>
        <span class="token keyword">public</span> <span class="token keyword">void</span> <span class="token function">windowClosing</span><span class="token punctuation">(</span> <span class="token class-name">WindowEvent</span> e <span class="token punctuation">)</span>
        <span class="token punctuation">{<!-- --></span>
           e<span class="token punctuation">.</span><span class="token function">getWindow</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">dispose</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
           <span class="token class-name">System</span><span class="token punctuation">.</span><span class="token function">exit</span><span class="token punctuation">(</span> <span class="token number">0</span> <span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token punctuation">}</span>
     <span class="token punctuation">}</span>
  <span class="token punctuation">)</span><span class="token punctuation">;</span>



}

}

/* JOptionPane类的常用静态方法如下：

showInputDialog()

showConfirmDialog()

showMessageDialog()

showOptionDialog()

*/


java运行
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            </div>

原文链接：https://blog.csdn.net/munangs/article/details/130052046

posted on 2025-11-19 19:38  sunny123456  阅读(0)  评论(0)    收藏  举报