南京邮电大学java第四次实验报告

时间：2018-06-07 20:47:57 阅读：693 评论：0 收藏：0 [点我收藏+]

实验报告

（ 2017 / 2018学年第2学期）

课程名称	JAVA语言程序设计
实验名称	Java集成开发环境的安装与使用、 Java变量、表达式与控制结构
实验时间	2018	年	6	月	7	日
指导单位	计算机学院软件教学中心
指导教师	许棣华

学生姓名	王利国	班级学号	B160209
学院(系)	电子与光学工程学院，微电子学院	专业	微电子科学与工程

实验名称

方法、数组和类

指导教师

许棣华

实验类型

上机

实验学时

实验时间

2017.6.7

一、实验目的

1. 了解和掌握Java中GUI组件和界面化设计

2. 掌握Java中创建线程对象的方法

3. 熟悉控制线程状态的过程

二、实验环境(实验设备)

1. 每位学生配备计算机一台

2. 计算机需安装好JDK和Jcreator

三、实验内容

1. 编写一个Applet，利用两个文本框对象input1和input2，接收用户从键盘输入的两个整型数。当用户单击“计算”按钮时，可进行算术计算，并输出运算结果；运算结果放在多行文本域JTextArea组件中。GUI界面参考教材198页9.6题。

package swing;

import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

/**
 * @Author liguo
 * @Description
 * @Data 2018-06-04 20:06
 */
public class Test {
    public static void main(String[] args) {
        // 创建 JFrame 实例
        JFrame frame = new JFrame( "四则运算" );
        frame.setSize( 350, 300 );
        frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );

        /* 创建面板，这个类似于 HTML 的 div 标签
         * 我们可以创建多个面板并在 JFrame 中指定位置
         * 面板中我们可以添加文本字段，按钮及其他组件。
         */
        JPanel panel = new JPanel();
        //添加面板
        frame.add( panel );
        /*
         * 调用用户定义的方法并添加组件到面板
         */
        placeComponents( panel );

        // 设置界面可见
        frame.setVisible( true );
    }

    private static void placeComponents(JPanel panel) {


        panel.setLayout( null );

        // 创建 JLabel
        JLabel firstLabel = new JLabel( "第一个数为" );
        /* 这个方法定义了组件的位置。
         * setBounds(x, y, width, height)
         * x 和 y 指定左上角的新位置，由 width 和 height 指定新的大小。
         */
        firstLabel.setBounds( 10, 20, 80, 25 );
        panel.add( firstLabel );

        //field
        JTextField firstNumber = new JTextField( 20 );
        firstNumber.setBounds( 100, 20, 165, 25 );
        panel.add( firstNumber );


        // 输入的文本域
        JLabel secondlabe2 = new JLabel( "第二个数字" );
        secondlabe2.setBounds( 10, 50, 80, 25 );
        panel.add( secondlabe2 );


        /**
         * 第二个数字的输入
         */

        JTextField secondNumber = new JTextField( 20 );
        secondNumber.setBounds( 100, 50, 165, 25 );
        panel.add( secondNumber );

        // 创建计算按钮
        JButton loginButton = new JButton( "计算" );
        loginButton.setBounds( 10, 80, 80, 25 );
        panel.add( loginButton );

        //添加页面输出
        JTextArea area = new JTextArea();
        area.setBounds( 100, 110, 165, 100 );
        panel.add( area );

        loginButton.addActionListener( new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                int a = Integer.parseInt( firstNumber.getText() );
                int b = Integer.parseInt( secondNumber.getText() );
                String str = "和为" + (a + b) +
                            "\n差为" + (a - b) +
                            "\n积为" + (a * b) +
                            "\n商为" + (a / b);
                area.append( str );
            }
        } );


    }
}

View Code

2. 编写一个应用程序，设计4个按钮，分别命名为“加”、“减”、“乘”、“除”，有3个文本框。单击相应的按钮，将两个文本框的数字做运算，在第三个文本框中显示结果。

/*
 * Created by JFormDesigner on Thu Jun 07 19:46:32 CST 2018
 */

package swing;

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

/**
 * @author ç??å?©å?½
 */
public class Test6 extends JFrame {

    public static void main(String[] args) {
        Test6 one = new Test6();
        one.setVisible( true );
    }
    public Test6() {
        initComponents();
    }


    private void button1ActionPerformed(ActionEvent e) {
        // TODO add your code here
        int a = Integer.parseInt( textField1.getText() );
        int b = Integer.parseInt( textField2.getText() );
        String  str1 = ""+(a+b);
        textArea1.append( str1 );
    }

    private void button2ActionPerformed(ActionEvent e) {
        // TODO add your code here
        int a = Integer.parseInt( textField1.getText() );
        int b = Integer.parseInt( textField2.getText() );
        String  str1 = ""+(a-b);
        textArea1.append( str1 );
    }

    private void button3ActionPerformed(ActionEvent e) {
        // TODO add your code here
        int a = Integer.parseInt( textField1.getText() );
        int b = Integer.parseInt( textField2.getText() );
        String  str1 = ""+(a*b);
        textArea1.append( str1 );
    }

    private void button4ActionPerformed(ActionEvent e) {
        // TODO add your code here
        int a = Integer.parseInt( textField1.getText() );
        int b = Integer.parseInt( textField2.getText() );
        String  str1 = ""+(a/b);
        textArea1.append( str1 );
    }

    private void initComponents() {
        // JFormDesigner - Component initialization - DO NOT MODIFY  //GEN-BEGIN:initComponents
        // Generated using JFormDesigner Evaluation license - ç??å?©å?½
        dialogPane = new JPanel();
        contentPanel = new JPanel();
        label1 = new JLabel();
        textField1 = new JTextField();
        label2 = new JLabel();
        textField2 = new JTextField();
        button1 = new JButton();
        scrollPane1 = new JScrollPane();
        textArea1 = new JTextArea();
        button2 = new JButton();
        button3 = new JButton();
        button4 = new JButton();
        buttonBar = new JPanel();

        //======== this ========
        Container contentPane = getContentPane();
        contentPane.setLayout(new BorderLayout());

        //======== dialogPane ========
        {
            dialogPane.setBorder(new EmptyBorder(12, 12, 12, 12));

            // JFormDesigner evaluation mark
            dialogPane.setBorder(new javax.swing.border.CompoundBorder(
                new javax.swing.border.TitledBorder(new javax.swing.border.EmptyBorder(0, 0, 0, 0),
                    "JFormDesigner Evaluation", javax.swing.border.TitledBorder.CENTER,
                    javax.swing.border.TitledBorder.BOTTOM, new java.awt.Font("Dialog", java.awt.Font.BOLD, 12),
                    java.awt.Color.red), dialogPane.getBorder())); dialogPane.addPropertyChangeListener(new java.beans.PropertyChangeListener(){public void propertyChange(java.beans.PropertyChangeEvent e){if("border".equals(e.getPropertyName()))throw new RuntimeException();}});

            dialogPane.setLayout(new BorderLayout());

            //======== contentPanel ========
            {
                contentPanel.setLayout(new GridBagLayout());
                ((GridBagLayout)contentPanel.getLayout()).columnWidths = new int[] {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
                ((GridBagLayout)contentPanel.getLayout()).rowHeights = new int[] {0, 0, 0, 0, 0, 0, 0, 0};
                ((GridBagLayout)contentPanel.getLayout()).columnWeights = new double[] {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0E-4};
                ((GridBagLayout)contentPanel.getLayout()).rowWeights = new double[] {0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 1.0E-4};

                //---- label1 ----
                label1.setText("\u7b2c\u4e00\u4e2a\u6570");
                contentPanel.add(label1, new GridBagConstraints(1, 1, 1, 1, 0.0, 0.0,
                    GridBagConstraints.CENTER, GridBagConstraints.BOTH,
                    new Insets(0, 0, 5, 5), 0, 0));

                //---- textField1 ----
                textField1.setText("                            ");
                contentPanel.add(textField1, new GridBagConstraints(3, 1, 6, 1, 0.0, 0.0,
                    GridBagConstraints.CENTER, GridBagConstraints.BOTH,
                    new Insets(0, 0, 5, 5), 0, 0));

                //---- label2 ----
                label2.setText("\u7b2c\u4e8c\u4e2a\u6570");
                contentPanel.add(label2, new GridBagConstraints(1, 2, 1, 1, 0.0, 0.0,
                    GridBagConstraints.CENTER, GridBagConstraints.BOTH,
                    new Insets(0, 0, 5, 5), 0, 0));

                //---- textField2 ----
                textField2.setText("                       ");
                contentPanel.add(textField2, new GridBagConstraints(3, 2, 6, 1, 0.0, 0.0,
                    GridBagConstraints.CENTER, GridBagConstraints.BOTH,
                    new Insets(0, 0, 5, 5), 0, 0));

                //---- button1 ----
                button1.setText("\u52a0");
                button1.addActionListener(e -> button1ActionPerformed(e));
                contentPanel.add(button1, new GridBagConstraints(1, 3, 1, 1, 0.0, 0.0,
                    GridBagConstraints.CENTER, GridBagConstraints.BOTH,
                    new Insets(0, 0, 5, 5), 0, 0));

                //======== scrollPane1 ========
                {

                    //---- textArea1 ----
                    textArea1.setText("          ");
                    scrollPane1.setViewportView(textArea1);
                }
                contentPanel.add(scrollPane1, new GridBagConstraints(3, 3, 11, 4, 0.0, 0.0,
                    GridBagConstraints.CENTER, GridBagConstraints.BOTH,
                    new Insets(0, 0, 0, 0), 0, 0));

                //---- button2 ----
                button2.setText("\u51cf");
                button2.addActionListener(e -> button2ActionPerformed(e));
                contentPanel.add(button2, new GridBagConstraints(1, 4, 1, 1, 0.0, 0.0,
                    GridBagConstraints.CENTER, GridBagConstraints.BOTH,
                    new Insets(0, 0, 5, 5), 0, 0));

                //---- button3 ----
                button3.setText("\u4e58");
                button3.addActionListener(e -> button3ActionPerformed(e));
                contentPanel.add(button3, new GridBagConstraints(1, 5, 1, 1, 0.0, 0.0,
                    GridBagConstraints.CENTER, GridBagConstraints.BOTH,
                    new Insets(0, 0, 5, 5), 0, 0));

                //---- button4 ----
                button4.setText("\u9664");
                button4.addActionListener(e -> button4ActionPerformed(e));
                contentPanel.add(button4, new GridBagConstraints(1, 6, 1, 1, 0.0, 0.0,
                    GridBagConstraints.CENTER, GridBagConstraints.BOTH,
                    new Insets(0, 0, 0, 5), 0, 0));
            }
            dialogPane.add(contentPanel, BorderLayout.CENTER);

            //======== buttonBar ========
            {
                buttonBar.setBorder(new EmptyBorder(12, 0, 0, 0));
                buttonBar.setLayout(new GridBagLayout());
                ((GridBagLayout)buttonBar.getLayout()).columnWidths = new int[] {0, 80};
                ((GridBagLayout)buttonBar.getLayout()).columnWeights = new double[] {1.0, 0.0};
            }
            dialogPane.add(buttonBar, BorderLayout.SOUTH);
        }
        contentPane.add(dialogPane, BorderLayout.CENTER);
        pack();
        setLocationRelativeTo(getOwner());
        // JFormDesigner - End of component initialization  //GEN-END:initComponents
    }

    // JFormDesigner - Variables declaration - DO NOT MODIFY  //GEN-BEGIN:variables
    // Generated using JFormDesigner Evaluation license - ç??å?©å?½
    private JPanel dialogPane;
    private JPanel contentPanel;
    private JLabel label1;
    private JTextField textField1;
    private JLabel label2;
    private JTextField textField2;
    private JButton button1;
    private JScrollPane scrollPane1;
    private JTextArea textArea1;
    private JButton button2;
    private JButton button3;
    private JButton button4;
    private JPanel buttonBar;
    // JFormDesigner - End of variables declaration  //GEN-END:variables
}

View Code

3. 编写一个有两个线程的程序，第一个线程用来计算2~100000之间的质数及个数，第二个线程用来计算100000~200000之间的质数及个数。

package swing;

/**
 * @Author liguo
 * @Description
 * @Data 2018-06-07 9:26
 */
public class Thread extends java.lang.Thread {

    public static void run(int min, int max) {
        int i, j;
        for (i = min; i <= max; i++) {
            for (j = 2; j < (int) Math.sqrt( i ); j++) {
                if (i % j == 0)
                    break;
                else
                    System.out.print( i );
                count++;
            }
            System.out.println( min + "  " + max + ":" + count );
        }
    }

    private int min, max;
    private static int count = 0;


    public static void main(String[] args) {
        Thread t1 = new Thread();
        Thread t2 = new Thread();
        t1.run( 2, 100000 );
        t2.run( 100000, 20000 );
    }
}