Second Synchronized Example

class TwoStrings {
static void print(String str1, String str2) {
System.out.print(str1);
try {
Thread.sleep(500);
} catch (InterruptedException ie) {
}
System.out.println(str2);
}
}

class PrintStringsThread implements Runnable {
Thread thread;
String str1, str2;
TwoStrings ts;
PrintStringsThread(String str1, String str2, TwoStrings ts)
{
this.str1 = str1;
this.str2 = str2;
this.ts = ts;
thread = new Thread(this);
thread.start();
}
public void run() {
synchronized (ts) {
ts.print(str1, str2);
}
}
}

class TestThread {
public static void main(String args[]) {
TwoStrings ts = new TwoStrings();
new PrintStringsThread("Hello ", "there.", ts);
new PrintStringsThread("How are ", "you?", ts);
new PrintStringsThread("Thank you ", "very much!", ts);
}
}