<分区>
我有一个问题。当我在同步块(synchronized block)中使用 notify() 时，我得到 IllegalMonitorStateException。谁能帮我解决这个问题？
我需要一个线程向第二个线程发送一个字符，然后这个线程必须等待，第二个线程打印这个字符。在第二个线程等待之后，第一个线程再次发送下一个字符
主要.java:
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
/*
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*/
public class Main extends JFrame {
Thread t1, t2;
Consumer con;
public Main() {
con = new Consumer();
startThreads();
}
private synchronized void startThreads() {
t1 = new Thread(new Producent("grudzien", con));
t1.start();
t2 = new Thread(con);
t2.start();
}
public class Producent implements Runnable {
String m_atom;
char[] atoms;
Consumer m_c;
public Producent(String atom, Consumer c) {
m_atom = atom;
m_c = c;
}
@Override
public void run() {
synchronized (this) {
atoms = m_atom.toCharArray();
System.out.print("Tablica znaków: ");
for (int i = 0; i < atoms.length; i++) {
System.out.print(atoms[i] + ", ");
}
}
for (int i = 0; i < atoms.length; i++) {
synchronized (this) {
con.setChar(atoms[i]);
t2.notify();
try {
wait();
} catch (InterruptedException ex) {
JOptionPane.showMessageDialog(null, "Blad w wait()", "Blad!", JOptionPane.ERROR_MESSAGE);
}
}
}
}
}
public class Consumer implements Runnable {
char atom;
public void setChar(char c) {
atom = c;
}
@Override
public void run() {
while (true) {
synchronized (this) {
try {
wait();
} catch (InterruptedException ex) {
JOptionPane.showMessageDialog(null, "Blad w wait()", "Blad!", JOptionPane.ERROR_MESSAGE);
}
System.out.println(atom);
t1.notify();
}
}
}
}
public static void main(String[] args) {
new Main();
}
}