能否帮写一个带界面的“两个数交换”程序 我对界面很高不清啊,求教! 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 import java.awt.EventQueue;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JTextField;import javax.swing.border.EmptyBorder;public class Test extends JFrame { private JPanel contentPane; private JTextField n1; private JTextField n2; /** * Launch the application. */ public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { public void run() { try { Test frame = new Test(); frame.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }); } /** * Create the frame. */ public Test() { setTitle("test"); setResizable(false); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setBounds(100, 100, 280, 99); contentPane = new JPanel(); contentPane.setBorder(new EmptyBorder(5, 5, 5, 5)); setContentPane(contentPane); contentPane.setLayout(null); n1 = new JTextField(); n1.setBounds(47, 10, 66, 21); contentPane.add(n1); n1.setColumns(10); n2 = new JTextField(); n2.setBounds(180, 10, 66, 21); contentPane.add(n2); n2.setColumns(10); JButton button = new JButton("\u4EA4\u6362"); button.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent arg0) { exchange(); } }); button.setBounds(57, 41, 74, 23); contentPane.add(button); JLabel label = new JLabel("\u6570\u5B571\uFF1A"); label.setBounds(0, 10, 47, 21); contentPane.add(label); JLabel label_1 = new JLabel("\u6570\u5B572\uFF1A"); label_1.setBounds(127, 10, 47, 21); contentPane.add(label_1); JButton button_1 = new JButton("\u6E05\u7A7A"); button_1.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent arg0) { n1.setText(""); n2.setText(""); } }); button_1.setBounds(147, 41, 74, 23); contentPane.add(button_1); } private void exchange(){ try { int numberInt_1=Integer.parseInt(n1.getText()); int numberInt_2=Integer.parseInt(n2.getText()); System.out.println("交换前:\n\t数字一:"+numberInt_1+"\n\t数字二:"+numberInt_2); int temp; /* * 先交换值,再显示在文本框中。 * 当然也可以直接显示,不用在顶定义个变量。这样只需 * n1.setText(""+numberInt_2); * n2.setText(""+numberInt_1); */ temp=numberInt_1; numberInt_1=numberInt_2; numberInt_2=temp; System.out.println("交换后:\n\t数字一:"+numberInt_1+"\n\t数字二:"+numberInt_2); n1.setText(""+numberInt_1); n2.setText(""+numberInt_2); } catch (Exception e) { JOptionPane.showMessageDialog(n1, "只能输入数字。"); } }} 代码看不懂 MySql 问题 菜鸟问题,如何得到vector中元素得个数?? JAVA题目,不难. 会做的大哥帮忙啊,在线急等. 求助!! java里面有没有unsigned integer类型? 关于class文件 我想在html中输入查询关键字,对数据库进行查询,显示在jsp中,帮我看看哪错了? 寻找Java高手合作! 如何在一个类中调用另外一个类中的方法。急等 DataInputStream里的readByte()读出来是乱码 Amchart 动态数据
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.border.EmptyBorder;
public class Test extends JFrame { private JPanel contentPane;
private JTextField n1;
private JTextField n2; /**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
Test frame = new Test();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
} /**
* Create the frame.
*/
public Test() {
setTitle("test");
setResizable(false);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 280, 99);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
n1 = new JTextField();
n1.setBounds(47, 10, 66, 21);
contentPane.add(n1);
n1.setColumns(10);
n2 = new JTextField();
n2.setBounds(180, 10, 66, 21);
contentPane.add(n2);
n2.setColumns(10);
JButton button = new JButton("\u4EA4\u6362");
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
exchange();
}
});
button.setBounds(57, 41, 74, 23);
contentPane.add(button);
JLabel label = new JLabel("\u6570\u5B571\uFF1A");
label.setBounds(0, 10, 47, 21);
contentPane.add(label);
JLabel label_1 = new JLabel("\u6570\u5B572\uFF1A");
label_1.setBounds(127, 10, 47, 21);
contentPane.add(label_1);
JButton button_1 = new JButton("\u6E05\u7A7A");
button_1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent arg0) {
n1.setText("");
n2.setText("");
}
});
button_1.setBounds(147, 41, 74, 23);
contentPane.add(button_1);
}
private void exchange(){
try {
int numberInt_1=Integer.parseInt(n1.getText());
int numberInt_2=Integer.parseInt(n2.getText());
System.out.println("交换前:\n\t数字一:"+numberInt_1+"\n\t数字二:"+numberInt_2);
int temp;
/*
* 先交换值,再显示在文本框中。
* 当然也可以直接显示,不用在顶定义个变量。这样只需
* n1.setText(""+numberInt_2);
* n2.setText(""+numberInt_1);
*/
temp=numberInt_1;
numberInt_1=numberInt_2;
numberInt_2=temp;
System.out.println("交换后:\n\t数字一:"+numberInt_1+"\n\t数字二:"+numberInt_2);
n1.setText(""+numberInt_1);
n2.setText(""+numberInt_2);
} catch (Exception e) {
JOptionPane.showMessageDialog(n1, "只能输入数字。");
}
}
}