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public class PrinterABC2 {static Thread printA;
static Thread printB;
static Thread printC;
public static void main(String[] args) {printA = new Thread(() -> {
while (true) {
LockSupport.park();
System.out.println("A");
if (printB != null) {
LockSupport.unpark(printB);
}
}
});
printB = new Thread(() -> {
while (true) {
LockSupport.park();
System.out.println("B");
if (printB != null) {
LockSupport.unpark(printC);
}
}
});
printC = new Thread(() -> {
while (true) {
LockSupport.park();
System.out.println("C");
if (printA != null) {
LockSupport.unpark(printA);
}
}
});
printA.start();
printB.start();
printC.start();
LockSupport.unpark(printA);
}
}
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