paquete uno;importar java.awt.Button;
importar java.awt.Component;
importar java.awt.Container;
importar java.awt.Frame;
importar java.awt.GridBagConstraints;
importar java.awt.GridBagLayout;
importar java.awt.Panel ;
importar java.awt.TextField;
importar java.awt.event.ActionEvent;
importar java.awt.event.ActionListener;
importar java.awt.event.WindowAdapter;
importar java.awt.event.WindowEvent;la clase pública ComFrame extiende el marco {
/**
*
*/
privado estático final largo serialVersionUID = 4815962372262243709L;
String valued="",op="",str="789/ 456*123-0.=+";
boolean clicknum=true,start=true;
int s=0;
double arg=0;
Botón btn=null;
TextField txtInput=new TextField(12);
GridBagLayout gbl=new GridBagLayout();
GridBagConstraints gbc=new GridBagConstraints();
Panel pan=new Panel();
componente privado addButton(nombre de cadena, contenedor con){
btn= new Button();
btn.addActionListener(new MyFrameListener());
btn.setLabel(nombre);
con.add(btn);
return btn;
}
private void setGbc(GridBagConstraints gbc,int x,int y,int width,int height,GridBagLayout gbl, Component con) {
gbc.gridx=x;
gbc.gridy=y;
gbc.gridwidth=ancho;
gbc.gridheight =altura;
gbl.setConstraints(con, gbc);
}
public ComFrame(){
this.setTitle( "Formulario informático");
pa
n.setLayout(gbl);
txtInput.setBounds(15, 45, 270, 25);
pan.setBounds(15, 80, 270, 150);
this.setLayout(null);
gbc.fill=GridBagConstraints.BOTH;
gbc.weightx=1.0;
gbc.weighty= 1.0;
this.add(txtInput);
this.add(pan);
for(int i=0;i<4;i++) {
for(int j=0;j<4;j++){
this.setGbc(gbc, j, i, 1, 1, gbl, this.addButton(str .substring(s, ++s), pan));
}
}
this.setGbc(gbc, 0, 4, 2, 1 , gbl, this.addButton("Clear", pan));
this.setGbc(gbc, 2, 4, 2, 1, gbl, this.addButton("Salir", pan));
this.setSize(300, 250);
this.setVisible(true);
this.addWindowListener(new WindowAdapter() {
@Override
ventana vacía públicaClosing(WindowEvent e) {
System.exit(0);
}
} );
}
public static void main(String[] args) {
new ComFrame();
}
clase MyFrameListener implementa ActionListener{
@Override
public void actionPerformed(ActionEvent e) {
// TODO Código auxiliar de método generado automáticamente
if(e.getActionCommand().equals("Borrar")){
}
else if(e.getActionCommand().equals("Salir ")){
System.exit(0);
}else{
Entrada(e.getActionCommand());
}
}
entrada nula privada (valor de cadena){
if(value.equals("+")){
if(arg!=0.0&&clicknum==true&&!op.equals("="))
operación(Double.valueOf(valued));
clicknum=false;
op="+";
}
else if(value.equals("-") ){
if(arg!=0.0&&clicknum==true&&!op.equals("="))
operación(Double.valueOf(valued));
clicknum=false;
op="-";
}
else if(value.equals("*")){
if(arg!=0.0&&clicknum==true&&!op.equals("="))
operación(Double.valueOf(valued));
clicknum =false;
op="*";
}
else if(value.equals("/")){
if(arg!=0.0&&clicknum==true&&!op.equals("="))
operación(Double.valueOf(valued));
clicknum=false;
op="/";
}
else if(value.equals("=")){
if(clicknum ==true&&!op.equals("=")){
operación(Double.valueOf(valued));
}
clicknum=false;
op="=";
start=false;
}
más {
si( op.equals("=")){
arg=0.0;
valorado=valor;
}
if(! op.equals("")&&clicknum==false){
if(arg==0.0&&start==true){
arg=Double.valueOf(valued); p>
}
valued="";
clicknum=true;
start=true;
}
if(value=="."&&valued.contains(".")){
}
else if(value=="."&&valued == ""){
valorado="0.";
}
else{
valorado=valorado+valor;
p>}
txtInput.setText(va
lued);
}
}
operación de anulación privada (Doble n){
if(op.equals("+" ))arg+=n;
if(op.equals("-"))arg-=n;
if(op.equals("*"))arg*= n;
if(op.equals("/"))arg/=n;
txtInput.setText(""+arg);
}
}
}El diseño del formulario debe estar bien