import javax.swing.*;
import java.awt.*;
public class mainFrame extends JFrame{
public mainFrame(String sTitle,int iWidth,int iHeight){
Dimension dim=Toolkit.getDefaultToolkit().getScreenSize();
ImageIcon ii=new ImageIcon("images/20.gif");
setTitle(sTitle);
setIconImage(ii.getImage());
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
setSize(iWidth,iHeight);
int w=getSize().width;
int h=getSize().height;
System.out.println("窗体宽:"+w+" 窗体高:"+h);
int x=(dim.width-w)/2;
int y=(dim.height-h)/2;
setLocation(x,y);
setVisible(true);
}
public static void main(String[] args){
JFrame.setDefaultLookAndFeelDecorated(true);
mainFrame mF=new mainFrame("main Frame Demo",400,300);
}
}
此程序能运行,但是显示不出窗口来。
import java.awt.*;
public class mainFrame extends JFrame{
public mainFrame(String sTitle,int iWidth,int iHeight){
Dimension dim=Toolkit.getDefaultToolkit().getScreenSize();
ImageIcon ii=new ImageIcon("images/20.gif");
setTitle(sTitle);
setIconImage(ii.getImage());
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
setSize(iWidth,iHeight);
int w=getSize().width;
int h=getSize().height;
System.out.println("窗体宽:"+w+" 窗体高:"+h);
int x=(dim.width-w)/2;
int y=(dim.height-h)/2;
setLocation(x,y);
setVisible(true);
}
public static void main(String[] args){
JFrame.setDefaultLookAndFeelDecorated(true);
mainFrame mF=new mainFrame("main Frame Demo",400,300);
}
}
此程序能运行,但是显示不出窗口来。
import java.awt.*;
public class mainFrame extends JFrame{
public mainFrame(String sTitle,int iWidth,int iHeight){
Dimension dim=Toolkit.getDefaultToolkit().getScreenSize();
ImageIcon ii=new ImageIcon("images/20.gif");
setTitle(sTitle);
setIconImage(ii.getImage());
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
setSize(iWidth,iHeight);
int w=getSize().width;
int h=getSize().height;
System.out.println("窗体宽:"+w+" 窗体高:"+h);
int x=(dim.width-w)/2;
int y=(dim.height-h)/2;
setLocation(x,y);
//setVisible(true);
}
public static void main(String[] args){
JFrame.setDefaultLookAndFeelDecorated(true);
mainFrame mF=new mainFrame("main Frame Demo",400,300);
mF.setVisible(true);
}
}
能解释下原因吗?
import java.awt.*;
public class mainFrame extends JFrame{
public mainFrame(String sTitle,int iWidth,int iHeight){
Dimension dim=Toolkit.getDefaultToolkit().getScreenSize();
ImageIcon ii=new ImageIcon("images/20.gif");
setTitle(sTitle);
setIconImage(ii.getImage());
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
setSize(iWidth,iHeight);
int w=getSize().width;
int h=getSize().height;
System.out.println("窗体宽:"+w+" 窗体高:"+h);
int x=(dim.width-w)/2;
int y=(dim.height-h)/2;
setLocation(x,y);
setVisible(true);
}
public static void main(String[] args){
JFrame.setDefaultLookAndFeelDecorated(true);
mainFrame mF=new mainFrame("main Frame Demo",400,300);
//缺少mF.show();或者mF.setVisible(true);
}
}
import java.awt.*;
public class mainFrame extends JFrame{ public mainFrame(String sTitle,int iWidth,int iHeight){
Dimension dim=Toolkit.getDefaultToolkit().getScreenSize();
ImageIcon ii=new ImageIcon("images/middle.gif");
setTitle(sTitle);
setIconImage(ii.getImage());
setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
setSize(iWidth,iHeight);
int w=getSize().width;
int h=getSize().height;
System.out.println("窗体宽:"+w+" 窗体高:"+h);
int x=(dim.width-w)/2;
int y=(dim.height-h)/2;
setLocation(x,y);
setVisible(true);
}
public static void main(String[] args){
JFrame.setDefaultLookAndFeelDecorated(true);
mainFrame mF=new mainFrame("main Frame Demo",400,300);
}
}
这个问题解决了。