该楼层疑似违规已被系统折叠 隐藏此楼查看此楼

具体的代码在这里：

import java.awt.FlowLayout;

import java.awt.GridLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.OutputStreamWriter;

import java.util.Scanner;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JTextArea;

import javax.swing.JTextField;

public class Program extends JFrame implements ActionListener {

JTextField txt1,txt2,txt3,txt4,txt5,txt6,max2,min2,avg2,sum2;

JLabel max1,min1,avg1,sum1,tishi;

private int[] numbers;

private JButton maxButton;

private JButton minButton;

private JButton averageButton;

private JButton sumButton;

private JButton saveButton;

private JButton exitButton;

public void init() {

setTitle("数字统计系统");

setSize(500,300);

setLayout(new GridLayout(4,8));

tishi=new JLabel("请输入6个数:");

add(tishi);

txt1=new JTextField("",5);

add(txt1);

txt2=new JTextField("",5);

add(txt2);

txt3=new JTextField("",5);

add(txt3);

txt4=new JTextField("",5);

add(txt4);

txt5=new JTextField("",5);

add(txt5);

txt6=new JTextField("",5);

add(txt6);

max1=new JLabel("最大值:");

add(max1);

max2=new JTextField("",5);

add(max2);

min1=new JLabel("最小值:");

add(min1);

min2=new JTextField("",5);

add(min2);

avg1=new JLabel("平均值:");

add(avg1);

avg2=new JTextField("",5);

add(avg2);

sum1=new JLabel("总和:");

add(sum1);

sum2=new JTextField("",5);

add(sum2);

maxButton = new JButton("最大值");

add(maxButton);

maxButton.addActionListener(this);

minButton = new JButton("最小值");

add(minButton);

minButton.addActionListener(this);

averageButton = new JButton("平均值");

add(averageButton);

averageButton.addActionListener(this);

sumButton = new JButton("总和");

add(sumButton);

sumButton.addActionListener(this);

saveButton = new JButton("保存");

add(saveButton);

saveButton.addActionListener(this);

exitButton = new JButton("退出");

add(exitButton);

exitButton.addActionListener(this);

setVisible(true);

setLocationRelativeTo(null);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

public void read() {

numbers = new int[5];

numbers[0]=Integer.parseInt(txt1.getText());

numbers[1]=Integer.parseInt(txt2.getText());

numbers[2]=Integer.parseInt(txt3.getText());

numbers[3]=Integer.parseInt(txt4.getText());

numbers[4]=Integer.parseInt(txt5.getText());

numbers[5]=Integer.parseInt(txt6.getText());

}

public int max() {

int temp = numbers[0];

int length = numbers.length;

for (int i = 1; i < length; i++) {

temp = (temp >= numbers[i]) ? temp : numbers[i];

}

return temp;

}

public int min() {

int temp = numbers[0];

int length = numbers.length;

for (int i = 1; i < length; i++) {

temp = (temp <= numbers[i]) ? temp : numbers[i];

}

return temp;

}

public double sum() {

double sum = 0;

int length = numbers.length;

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

sum += numbers[i];

}

return sum;

}

public double average() {

double sum = sum();

int length = numbers.length;

return (sum / length);

}

public int[] sort() {

int length = numbers.length;

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

for (int j = i; j < length; j++) {

if (numbers[i] > numbers[j]) {

int temp = numbers[i];

numbers[i] = numbers[j];

numbers[j] = temp;

}

}

}

return numbers;

}

public void save() {

File file = new File("G:/data.txt");

try {

FileOutputStream fos = new FileOutputStream(file);

OutputStreamWriter osw = new OutputStreamWriter(fos);

osw.write("最大值："+max());

osw.write("最小值："+min());

osw.write("平均值："+average());

osw.write("总和："+sum());

osw.write("排序后的数为：");

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

osw.write(+numbers[i] + " ");

}

osw.flush();

osw.close();

fos.close();

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

}

public void exit() {

System.exit(0);

}

public static void main(String[] args) {

//Scanner scanner = new Scanner(System.in);

//int n = scanner.nextInt();

JTextField txt1 = new JTextField();

Program program = new Program();

program.read();

program.init();

}

public void actionPerformed(ActionEvent e) {

if (e.getSource() == maxButton) {

int max = max();

max2.setText("最大值"+max);

} else if (e.getSource() == minButton) {

int min = min();

min2.setText("最小值"+min);

} else if (e.getSource() == averageButton) {

double average = average();

avg2.setText("平均值"+average);

} else if (e.getSource() == sumButton) {

double sum = sum();

sum2.setText("总和"+sum);

} else if (e.getSource() == saveButton) {

save();

System.out.println("保存成功!");

} else if (e.getSource() == exitButton) {

exit();

}

}

}

出错误了，可是我一直找不到是为什么，请问有高人愿意帮我一下吗？

很着急的现在，谢谢。

我现在有一个问题初学JAVA真心不会啊~求大神帮忙！我在ComponentInWindow.java写的下列代码importjava.awt.*;importjavax.swing.*;importjava.awt.event.KeyEvent;importstaticjavax....

我现在有一个问题 初学JAVA真心不会啊~求大神帮忙！

我在ComponentInWindow.java写的下列代码

import java.awt.*;

import javax.swing.*;

import java.awt.event.KeyEvent;

import static javax.swing.JFrame.*;

public class ComponentInWindow extends JFrame{

JTextField text;

JButton button;

JCheckBox checkBox1,checkBox2,checkBox3;

JTextArea area;

JMenuBar menubar;

JMenu menu,subMenu;

JMenuItem item1,item2;

JianShi jian;

public ComponentInWindow(){}

public ComponentInWindow(String s,int x,int y,int w,int h){

init(s);

setLocation(x,y);

setSize(w,h);

setVisible(true);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

void init(String s){

jian=new JianShi();

setTitle(s);

menubar=new JMenuBar();

menu=new JMenu("文件");

subMenu=new JMenu("操作");

item1=new JMenuItem("打开");

item2=new JMenuItem("保存");

menu.add(item1);

menu.addSeparator();

menu.add(item2);

menu.add(subMenu);

subMenu.add(new JMenuItem("增加文章"));

subMenu.add(new JMenuItem("修改文章"));

menubar.add(menu);

setJMenuBar(menubar);

setLayout(new FlowLayout());

add(new JLabel("检索此字符出现次数(最长可以70)： "));

text=new JTextField(70);

add(text);

add(new JLabel("英文字数： "));

text=new JTextField(16);

add(text);

add(new JLabel("空格字数： "));

text=new JTextField(16);

add(text);

add(new JLabel("总字数： "));

text=new JTextField(16);

jian.gettext(text);

add(text);

add(new JLabel("输入"));

area=new JTextArea(30,60);

(area.getDocument()).addDocumentListener(jian);

add(new JScrollPane(area));

jian.getarea(area);

add(new JLabel());

button=new JButton("统计");

add(button);

}

}

然后我希望能获取到“检索此字符出现次数”的内容

怎么在JianShi2.java中写代码，怎么实现~

展开

展开全部

代码62616964757a686964616fe59b9ee7ad9431333366303137如下：import java.awt.Dimension;

import java.awt.FlowLayout;

import javax.swing.JButton;

import javax.swing.JComboBox;

import javax.swing.JFrame;

import javax.swing.JTextField;

public class App extends JFrame {

private JComboBox cbxNicks;

// 昵称

private String[] nicks = {

"测试", "李二牛", "牛大胆",

"张三", "李四", "王五"

};

public App() {

this.setSize(350, 150);

this.setLocationRelativeTo(null);

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

this.setLayout(new FlowLayout());

JTextField txtNick = new JTextField();

txtNick.setPreferredSize(new Dimension(100, 23));

this.add(txtNick);

JButton btnQuery = new JButton("查询");

btnQuery.setPreferredSize(new Dimension(60, 23));

btnQuery.addActionListener(e -> {

cbxNicks.removeAllItems();

for (String nick : nicks) {

if (nick.contains(txtNick.getText())) {

cbxNicks.addItem(nick);

}

}

});

this.add(btnQuery);

cbxNicks = new JComboBox();

cbxNicks.setPreferredSize(new Dimension(100, 23));

this.add(cbxNicks);

}

public static void main(String[] args) {

new App().setVisible(true);

}

}

运行结果：