java - 按鈕排列(升級版)

將Frame改成 JFrame


//Swing, Button Class
import java.awt.*;
import java.awt.event.*;
import javax.swing.JFrame;

public class SwingTest extends JFrame
{
static JFrame myfrm=new JFrame("Button class"); // Java Class JFrame
static Button btn1=new Button("Button 1"); // 建立1按鈕物件
static Button btn2=new Button("Button 2"); // 建立2按鈕物件
static TextField tbx1=new TextField("TextField  1"); // 建立1文字方塊物件

public static void main(String args[])
{
BorderLayout border=new BorderLayout();
myfrm.setLayout(border);
myfrm.setSize(250,150);
myfrm.add(btn1, border.EAST); // 在視窗內加入按鈕1
myfrm.add(btn2, border.CENTER); // 在視窗內加入按鈕2
myfrm.add(tbx1, border.WEST); // 在視窗內加入按鈕2
myfrm.setVisible(true);
}
public void actionPerformed(ActionEvent e)
{
int rn;
rn=(int) (Math.random()*49) ;
System.out.println(rn );
}
}

再來將Button也改成JButton
將TextField也改成JTextField


//Swing, JButton Class
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class SwingTest extends JFrame
{
static JFrame myfrm=new JFrame("JButton class"); // Java Class JFrame
static JButton btn1=new JButton("JButton 1"); // 建立1按鈕物件
static JButton btn2=new JButton("JButton 2"); // 建立2按鈕物件
static JTextField tbx1=new JTextField("JTextField  1"); // 建立1文字方塊物件

public static void main(String args[])
{
BorderLayout border=new BorderLayout();
myfrm.setLayout(border);
myfrm.setSize(250,150);
myfrm.add(btn1, border.EAST); // 在視窗內加入按鈕1
myfrm.add(btn2, border.CENTER); // 在視窗內加入按鈕2
myfrm.add(tbx1, border.WEST); // 在視窗內加入按鈕2
myfrm.setVisible(true);
}
public void actionPerformed(ActionEvent e)
{
int rn;
rn=(int) (Math.random()*49) ;
System.out.println(rn );
}
}

改變按鈕的排列
加入GridLayout


//Swing, JButton Class
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class SwingTest extends JFrame
{
static JFrame myfrm=new JFrame("JButton class"); // Java Class JFrame
static JButton btn1=new JButton("JButton 1"); // 建立1按鈕物件
static JButton btn2=new JButton("JButton 2"); // 建立2按鈕物件
static JTextField tbx1=new JTextField("JTextField  1"); // 建立1文字方塊物件

public static void main(String args[])
{
//BorderLayout border=new BorderLayout();
GridLayout border=new GridLayout(0,2);
myfrm.setLayout(border);
myfrm.setSize(250,150);
myfrm.add(btn1, border); // 在視窗內加入按鈕1
myfrm.add(btn2, border); // 在視窗內加入按鈕2
myfrm.add(tbx1, border); // 在視窗內加入按鈕2

/*
String[] numbers = {"0", "1", "2", "3", 4", "5", "6", "7", "8", "9"}; // goes on to 26
JButtons[] buttons = new JButton(numbers.length)
// create instance of each button
for (int i = 0; i < numbers.length; i++)
{
buttons[i] = new JButton(numbers[i]); // create buttons
}
*/




myfrm.setVisible(true);
}
public void actionPerformed(ActionEvent e)
{
int rn;
rn=(int) (Math.random()*49) ;
System.out.println(rn );
}
}

再打上另外的指令
更方便也更簡單的增加按鈕

//Swing, JButton Class

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class SwingTest extends JFrame

{

static JFrame myfrm=new JFrame("JButton class"); // Java Class JFrame

static JButton btn1=new JButton("JButton 1"); // 建立1按鈕物件

static JButton btn2=new JButton("JButton 2"); // 建立2按鈕物件

static JTextField tbx1=new JTextField("JTextField  1"); // 建立1文字方塊物件

public static void main(String args[])

{

//BorderLayout border=new BorderLayout();

GridLayout border=new GridLayout(0,2);

String numbers[] = {"0", "1", "2", "3"," 4", "5", "6", "7", "8", "9"}; // goes on to 26

JButton buttons[]=new JButton[10];

myfrm.setLayout(border);

myfrm.setSize(250,150);

myfrm.add(btn1, border); // 在視窗內加入按鈕1

myfrm.add(btn2, border); // 在視窗內加入按鈕2

myfrm.add(tbx1, border); // 在視窗內加入按鈕2

// create instance of each button

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

{

buttons[i] = new JButton(numbers[i]); // create buttons

myfrm.add(buttons[i], border); // 在視窗內加入按鈕1

}

myfrm.setVisible(true); 

}

public void actionPerformed(ActionEvent e) 

{ 

int rn;

rn=(int) (Math.random()*49) ; 

System.out.println(rn );

}

}

改成3*3矩陣

//Swing, JButton Class
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;


public class SwingTest extends JFrame
{
static JFrame myfrm=new JFrame("JButton class"); // Java Class JFrame


public static void main(String args[])
{
//BorderLayout border=new BorderLayout();
GridLayout border=new GridLayout(3,3);


String numbers[] = {"0", "1", "2", "3"," 4", "5", "6", "7", "8"}; // goes on to 26
JButton buttons[]=new JButton[10];


myfrm.setLayout(border);
myfrm.setSize(250,150);






// create instance of each button
for (int i = 0; i < numbers.length; i++)
{
buttons[i] = new JButton(numbers[i]); // create buttons
myfrm.add(buttons[i], border); // 在視窗內加入按鈕1
}








myfrm.setVisible(true); 
}
public void actionPerformed(ActionEvent e) 
{ 
int rn;
rn=(int) (Math.random()*49) ; 
System.out.println(rn );
}
}

增加panel

//Swing, JButton Class

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

public class SwingTest extends JFrame

{

static JFrame myfrm=new JFrame("JButton class"); // Java Class JFrame

public static void main(String args[])

{

//BorderLayout border=new BorderLayout();

GridLayout border=new GridLayout(3,3);

JPanel p = new JPanel(border); //PREFERRED!

myfrm.add(p);

String numbers[] = {"0", "1", "2", "3"," 4", "5", "6", "7", "8"}; // goes on to 26

JButton buttons[]=new JButton[10];

myfrm.setLayout(border);

myfrm.setSize(250,150);

// create instance of each button

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

{

buttons[i] = new JButton(numbers[i]); // create buttons

myfrm.add(buttons[i], border); // 在視窗內加入按鈕1

}

myfrm.setVisible(true); 

}

public void actionPerformed(ActionEvent e) 

{ 

int rn;

rn=(int) (Math.random()*49) ; 

System.out.println(rn );

}

}

------------------------------------------------------------------------------------------------------------------------------------

// with event
//AWT, JButton類別 有ActionListener
//AWT, JButton類別
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;




public class AwtTestEvent extends JFrame implements ActionListener
{
//static JJFrame myfrm=new JFrame("JButton class"); // Java Class JFrame
//static AwtTestEvent myfrm=new AwtTestEvent("JFrame 1 "); // Java Class JFrame
static JButton btn1=new JButton("JButton 1"); // 建立1按鈕物件
static JTextField tbx1=new JTextField("          "); // 建立1文字方塊物件


public static void main(String args[])
{
String numbers[] = {"0", "1", "2", "3"," 4", "5", "6", "7", "8"}; // goes on to 26
JButton buttons[]=new JButton[10];




AwtTestEvent myfrm=new AwtTestEvent();
GridLayout border1=new GridLayout(3,3);
GridLayout border2=new GridLayout(2,1);




JPanel p1 = new JPanel(border1); //PREFERRED!
JPanel p2 = new JPanel(border2); //PREFERRED!


// create instance of each button
for (int i = 0; i < numbers.length; i++)
{
buttons[i] = new JButton(numbers[i]); // create buttons
p1.add(buttons[i], border1); // 在視窗內加入按鈕1
}
myfrm.add(p1);


myfrm.add(p2);






myfrm.setLayout(border1);
myfrm.setLayout(border2);


myfrm.setSize(250,150);
btn1.addActionListener(myfrm);




p2.add(btn1, border2); // 在視窗內加入按鈕1
p2.add(tbx1, border2); // 在視窗內加入文字方塊1; 


myfrm.setVisible(true); 


}
public void actionPerformed(ActionEvent e) 
{ 
String sr;
sr=tbx1.getText();
System.out.println(sr);
}
}