Witam. Robię w Javie kalkulator (tak, jestem początkujący) i mam taki pewnie banalny problem bo, w klacie public void actionPerformed(ActionEvent e) linijka System.out.println(intNum); działa tak jak powinna ale w public static void main(String[] args) nie działa (komentarz: //JEDEN 111111111). Co zmienia słówko static przed int, oprócz tego, że można na nim operować w public static void main(String[] args)?
Kod:
import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class Calculator extends JFrame implements ActionListener
{
static JTextArea screen;
JButton b0utton, b1utton, b2utton, b3utton, b4utton, b5utton, b6utton, b7utton, b8utton, b9utton, b10utton, b11utton, b12utton, b13utton, b14utton,
b15utton, b16utton, b17utton, b18utton, b19utton, b20utton, b21utton, b22utton, b23utton, b24utton, b25utton, b26utton, b27utton;
static String inScreen = "";
static int intNum = 0;
static int intNum2 = 0;
static int intNumEnd = 0;
boolean dodawanie = false;
boolean odejmowanaie = false;
boolean mnozenie = false;
boolean dzielenie = false;
boolean rownasie = false;
public Calculator()
{
setSize(255, 320);
setResizable(false);
setTitle("Calculator");
setLayout(null);
screen = new JTextArea();
screen.setBounds(10,40,222, 50);
screen.setEditable(false);
screen.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
screen.setFont(new Font("Courier New", Font.ITALIC, 30));
add(screen);
//pierwsza kolumna
b0utton = new JButton("");
b0utton.setBounds(10, 95, 42, 25);
b0utton.addActionListener(this);
add(b0utton);
b1utton = new JButton("B");
b1utton.setBounds(10, 125, 42, 25);
b1utton.addActionListener(this);
add(b1utton);
b2utton = new JButton("7");
b2utton.setBounds(10, 155, 42, 25);
b2utton.addActionListener(this);
add(b2utton);
b3utton = new JButton("4");
b3utton.setBounds(10, 185, 42, 25);
b3utton.addActionListener(this);
add(b3utton);
b4utton = new JButton("1");
b4utton.setBounds(10, 215, 42, 25);
b4utton.addActionListener(this);
add(b4utton);
b5utton = new JButton("0");
b5utton.setBounds(10, 245, 87, 25);
b5utton.addActionListener(this);
add(b5utton);
//druga kolumna
b6utton = new JButton("");
b6utton.setBounds(55, 95, 42, 25);
b6utton.addActionListener(this);
add(b6utton);
b7utton = new JButton("");
b7utton.setBounds(55, 125, 42, 25);
b7utton.addActionListener(this);
add(b7utton);
b8utton = new JButton("8");
b8utton.setBounds(55, 155, 42, 25);
b8utton.addActionListener(this);
add(b8utton);
b9utton = new JButton("5");
b9utton.setBounds(55, 185, 42, 25);
b9utton.addActionListener(this);
add(b9utton);
b10utton = new JButton("2");
b10utton.setBounds(55, 215, 42, 25);
b10utton.addActionListener(this);
add(b10utton);
//trzecia kolumna
b11utton = new JButton("");
b11utton.setBounds(100, 95, 42, 25);
b11utton.addActionListener(this);
add(b11utton);
b12utton = new JButton("");
b12utton.setBounds(100, 125, 42, 25);
b12utton.addActionListener(this);
add(b12utton);
b13utton = new JButton("9");
b13utton.setBounds(100, 155, 42, 25);
b13utton.addActionListener(this);
add(b13utton);
b14utton = new JButton("6");
b14utton.setBounds(100, 185, 42, 25);
b14utton.addActionListener(this);
add(b14utton);
b15utton = new JButton("3");
b15utton.setBounds(100, 215, 42, 25);
b15utton.addActionListener(this);
add(b15utton);
b16utton = new JButton(",");
b16utton.setBounds(100, 245, 42, 25);
b16utton.addActionListener(this);
add(b16utton);
//czwarta kolumna
b17utton = new JButton("");
b17utton.setBounds(145, 95, 42, 25);
b17utton.addActionListener(this);
add(b17utton);
b18utton = new JButton("");
b18utton.setBounds(145, 125, 42, 25);
b18utton.addActionListener(this);
add(b18utton);
b19utton = new JButton("/");
b19utton.setBounds(145, 155, 42, 25);
b19utton.addActionListener(this);
add(b19utton);
b20utton = new JButton("*");
b20utton.setBounds(145, 185, 42, 25);
b20utton.addActionListener(this);
add(b20utton);
b21utton = new JButton("-");
b21utton.setBounds(145, 215, 42, 25);
b21utton.addActionListener(this);
add(b21utton);
b22utton = new JButton("+");
b22utton.setBounds(145, 245, 42, 25);
b22utton.addActionListener(this);
add(b22utton);
//piąta kolumna
b23utton = new JButton("");
b23utton.setBounds(190, 95, 42, 25);
b23utton.addActionListener(this);
add(b23utton);
b24utton = new JButton("");
b24utton.setBounds(190, 125, 42, 25);
b24utton.addActionListener(this);
add(b24utton);
b25utton = new JButton("%");
b25utton.setFont(new Font("Courier New", Font.ITALIC, 14));
b25utton.setBounds(190, 155, 42, 25);
b25utton.addActionListener(this);
add(b25utton);
b26utton = new JButton("");
b26utton.setBounds(190, 185, 42, 25);
b26utton.addActionListener(this);
add(b26utton);
b27utton = new JButton("=");
b27utton.setBounds(190, 215, 42, 55);
b27utton.addActionListener(this);
add(b27utton);
}
public static void main(String[] args)
{
String appStyle = "Nimbus"; //tutaj zmienieać style
Calculator window = new Calculator();
window.setDefaultCloseOperation(EXIT_ON_CLOSE);
window.setVisible(true);
try
{
for (UIManager.LookAndFeelInfo info : UIManager.getInstalledLookAndFeels())
{
if (appStyle.equals(info.getName()))
{
UIManager.setLookAndFeel(info.getClassName());
break;
}
}
}
catch (Exception e)
{
System.out.println("LookAmdFeel Error");
}
boolean dodawanie = false;
boolean odejmowanaie = false;
boolean mnozenie = false;
boolean dzielenie = false;
boolean rownasie = false;
if (dodawanie = true)
{
if (rownasie = true)
{
//screen.append(String.valueOf(intNum));
System.out.println(intNum); //JEDEN 111111111
}
dodawanie = false;
rownasie = false;
}
}
@Override
public void actionPerformed(ActionEvent e)
{
Object source = e.getSource();
if (source==b0utton)
{
System.out.println("---");
System.out.println(intNum);
System.out.println(intNum2);
System.out.println(intNumEnd);
System.out.println("---");
}
if (source==b1utton)
{
}
if (source==b2utton)
{
intNum = intNum + 7;
}
if (source==b3utton)
{
intNum = intNum + 4;
System.out.println(intNum);
}
if (source==b4utton)
{
intNum = intNum + 1;
System.out.println(intNum);
}
if (source==b5utton)
{
intNum = intNum + 0;
}
if (source==b6utton)
{
}
if (source==b7utton)
{
}
if (source==b8utton)
{
intNum = intNum + 8;
}
if (source==b9utton)
{
intNum = intNum + 5;
}
if (source==b10utton)
{
intNum = intNum + 2;
}
if (source==b11utton)
{
}
if (source==b12utton)
{
}
if (source==b13utton)
{
intNum = intNum + 9;
}
if (source==b14utton)
{
intNum = intNum + 6;
}
if (source==b15utton)
{
intNum = intNum + 3;
}
if (source==b16utton)
{
screen.append(",");
}
if (source==b17utton)
{
}
if (source==b18utton)
{
}
if (source==b19utton)//operacja
{
dzielenie = true;
}
if (source==b20utton)//operacja
{
mnozenie = true;
}
if (source==b21utton)//operacja
{
odejmowanaie = true;
}
if (source==b22utton) //operacja
{
dodawanie = true;
System.out.println("dodawanie");
}
if (source==b23utton)
{
}
if (source==b24utton)
{
}
if (source==b25utton)//operacja
{
screen.append("%");
}
if (source==b26utton)
{
}
if (source==b27utton)//operacja
{
rownasie = true;
System.out.println("rownasie");
}
}
}
