package threadbook.ch07;

public class DirtyRead extends Object {

private String fname;

private String lname;

public String getNames() {

return lname + ", " + fname;

}

public synchronized void setNames(

String firstName,

String lastName

) {

print("entering setNames()");

fname = firstName;

try { Thread.sleep(1000); }

catch ( InterruptedException x ) { }

lname = lastName;

print("leaving setNames() - " + lname + ", " + fname);

}

public static void print(String msg) {

String threadName = Thread.currentThread().getName();

System.out.println(threadName + ": " + msg);

}

public static void main(String[] args) {

final DirtyRead dr = new DirtyRead();

dr.setNames("George", "Washington"); // initially

Runnable runA = new Runnable() {

public void run() {

dr.setNames("Abe", "Lincoln");

}

};

Thread threadA = new Thread(runA, "threadA");

threadA.start();

try { Thread.sleep(200); }

catch ( InterruptedException x ) { }

Runnable runB = new Runnable() {

public void run() {

print("getNames()=" + dr.getNames());

}

};

Thread threadB = new Thread(runB, "threadB");

threadB.start();

}

}