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Aplicatii simple Java

Coding in Java
  1. editam codul sursa,salvam cu numele hello.java
  2. compilare: javac hello.java
  3. executie: java hello

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
        double unu,doi,rezultat;
        unu=Double.parseDouble(jTextField1.getText());
        doi=Double.parseDouble(jTextField2.getText());
        rezultat=unu + doi;
        NumberFormat x= NumberFormat.getNumberInstance();
        jLabel4.setText(" " + x.format(rezultat));

}

private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
    double unu,doi,rezultat;
    unu=Double.parseDouble(jTextField1.getText());
    doi=Double.parseDouble(jTextField2.getText());
    rezultat=unu - doi;
    NumberFormat x= NumberFormat.getNumberInstance();
    jLabel4.setText(" " + x.format(rezultat));

}

private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {
    double unu,doi,rezultat;
    unu=Double.parseDouble(jTextField1.getText());
    doi=Double.parseDouble(jTextField2.getText());
    rezultat=unu * doi;
    NumberFormat x= NumberFormat.getNumberInstance();
    jLabel4.setText(" " + x.format(rezultat));
}



private void jMenuItem6ActionPerformed(java.awt.event.ActionEvent evt){
     denumire.setForeground(Color.BLUE);
}
private void jMenuItem7ActionPerformed(java.awt.event.ActionEvent evt){
     denumire.setForeground(Color.RED);
}

private void jMenuItem8ActionPerformed(java.awt.event.ActionEvent evt){
     denumire.setForeground(Color.GREEN);
}

private void jMenuItem1ActionPerformed(java.awt.event.ActionEvent evt){
     jLabel1.setIcon(new ImageIcon("/Image/rata.jpg"));
}

private void jMenuItem2ActionPerformed(java.awt.event.ActionEvent evt){
  jLabel1.setIcon(new ImageIcon(getClass().getResource("/Image/cat.jpg")));
}



public figuri() {
    initComponents();
    supdes=new desenare(this);//se declara un obiect apartinand clasei desenare
    supdes.setPreferredSize(new Dimension(500,300)); //dimensiunile formului
    getContentPane().add(supdes,java.awt.BorderLayout.CENTER);
    pack();
}

//preia valoarea din caseta text (din fereastra dialog),lungimea drept.
public int getH(){
        int valoare=0;
        try {
            valoare=Integer.parseInt(h.getText());
                    }
        catch(NumberFormatException ex) {}
        return valoare;
}

//preia valoarea, latimea drept.
public int getV(){
        int valoare=0;
        try {
            valoare=Integer.parseInt(v.getText());
                    }
        catch(NumberFormatException ex) {}
        return valoare;
}