Witam mam dziwny problem o to kod :
package mattoy;
import java.util.*;
/**
*
-
@Author Walperin
*/
public class w1 extends Thread {
Baza b;
klasagraf z;
public void run()
{
for(int i=0; i<5; i++)
{
Random rand = new Random();
int liczba1 = rand.nextInt(14);
int liczba2 = rand.nextInt(5);
System.out.println(liczba1+" * "+liczba2);
z.wyswietl("Ile jest :"+liczba1+"*"+liczba2+" ?"); $$$**$$$ opis bledu ponizej
b.set(liczba1,liczba2);
try {
Thread.sleep(5000);
} catch (InterruptedException ex) {
ex.printStackTrace();
}
}
}
/** Creates a new instance of w1 */
public w1() {
}
}
$$**$$ Exception in thread "Thread-3" java.lang.NullPointerException
at mattoy.w2.run(w2.java:27) takie cos mi wyskakuje zawsze kiedy korzystam z metod klasy :
package mattoy;
/**
*
-
@Author Walperin
/
public class klasagraf extends javax.swing.JFrame {
w1 watek1;
w2 watek2;
/* Creates new form klasagraf */
public klasagraf() {
initComponents();
}/** This method is called from within the constructor to
-
initialize the form.
-
WARNING: Do NOT modify this code. The content of this method is
-
always regenerated by the Form Editor.
*/
// <editor-fold defaultstate="collapsed" desc=" Generated Code ">
private void initComponents() {
jLabel1 = new javax.swing.JLabel();
jButton1 = new javax.swing.JButton();
jTextField1 = new javax.swing.JTextField();
jLabel2 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jLabel1.setBackground(new java.awt.Color(204, 204, 255));
jLabel1.setText("text");
jLabel1.setBorder(javax.swing.BorderFactory.createBevelBorder(javax.swing.border.BevelBorder.RAISED));jButton1.setText("jButton1");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});jTextField1.setText("jTextField1");
jLabel2.setText("0");
jLabel3.setText("Punktacja");
org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.addContainerGap()
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.add(jLabel1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 227, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED, 6, Short.MAX_VALUE)
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(jButton1)
.add(jTextField1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
.add(51, 51, 51))
.add(layout.createSequentialGroup()
.add(jLabel3)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
.add(jLabel2)
.addContainerGap())))
);
layout.setVerticalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.addContainerGap()
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
.add(jTextField1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
.add(jLabel1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, 31, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
.add(jButton1)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED, 63, Short.MAX_VALUE)
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
.add(jLabel3)
.add(jLabel2))
.add(38, 38, 38))
);
pack();
}// </editor-fold>
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
// przycisk klik
}/**
-
@param args the command line arguments
*/
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() { ******************* zawartosc napisana przeze mnie, od tad w dolw1 watek1= new w1(); w2 watek2= new w2(); klasagraf k = new klasagraf(); Baza bb= new Baza(); watek1.b=bb; watek2.b=bb; watek1.z=k; new klasagraf().setVisible(true); watek1.start(); watek2.start(); }
});
}
public void wyswietl(String zapytanie)
{
jLabel1.setText(zapytanie);
}
public String getTextField()
{
return jTextField1.getText();
}
public void ustawPkt(String punkt)
{
jLabel2.setText(punkt);
} **************************** do tad
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JTextField jTextField1;
// End of variables declaration
-
}
Dziekuje z gory za helpa