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import javaawteventActionEvent; import javaawteventActionListener; import javaawtContainer; import javaawtFlowLayout; import javaxswingJFrame; import javaxswingJTextField; import javaxswingJButton; public class Computer {
/** * @param args */ private static int numClicks=; public static void main(String[] args) { // TODO Autogenerated method stub final JFrame jf=new JFrame(计算器); final Container c=jfgetContentPane(); csetLayout(new FlowLayout(FlowLayoutCENTER)); final JTextField f=new JTextField(); final JTextField f=new JTextField(); final JTextField f=new JTextField(); final JButton b=new JButton(+);//内部类如果要使用外部类的变量必须使用final修饰符 final JButton b=new JButton(=); baddActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { numClicks++; switch(numClicks%) { case :bsetText(+);break; case :bsetText();break; case :bsetText(*);break; case :bsetText(/);break; } } }); baddActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e) { int n=IntegerparseInt(fgetText()); int n=IntegerparseInt(fgetText()); int n=n+n; switch(numClicks%) { case :n=n+n;break; case :n=nn;break; case :n=n*n;break; case :n=n/n;break; } fsetText(StringvalueOf(n)); } }); cadd(f); cadd(b); cadd(f); cadd(b); cadd(f); jfsetDefaultCloseOperation(JFrameEXIT_ON_CLOSE); jfsetSize( ); jfsetVisible(true); } } |
