java向文本框中插入字符_JAVA中在窗体中添加了一个文本框，然后再文本框中输入字符，如何...

小鱼儿 2022-11-10 05:59 173阅读 0赞

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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。

java向文本框中插入字符_JAVA中在窗体中添加了一个文本框，然后再文本框中输入字符，如何...

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