// join(["a", "b", "c"]) -> "a and b and c"

String join(List<String> strs) {

 StringBuilder sb = new StringBuilder();

 boolean first = true;

 for (String s : strs) {

 if (first) first = false;

 else sb.append(" and ");

 sb.append(s);

 }

 return sb.toString();

}

Random rand = new Random();

 

// Between 1 and 6, inclusive

int diceRoll() {

 return rand.nextInt(6) + 1;

}

void filter(List<String> list) {

 for (Iterator<String> iter = list.iterator(); iter.hasNext(); ) {

 String item = iter.next();

 if (...)

  iter.remove();

 }

}

String reverse(String s) {

 return new StringBuilder(s).reverse().toString();

}

void startAThread0() {

 new Thread(new MyRunnable()).start();

}

 

class MyRunnable implements Runnable {

 public void run() {

 ...

 }

}

void startAThread1() {

 new MyThread().start();

}

 

class MyThread extends Thread {

 public void run() {

 ...

 }

}

void startAThread2() {

 new Thread() {

 public void run() {

  ...

 }

 }.start();

}

void writeStuff() throws IOException {

 OutputStream out = new FileOutputStream(...);

 try {

 out.write(...);

 } finally {

 out.close();

 }

}

void doWithLock(Lock lock) {

 lock.acquire();

 try {

 ...

 } finally {

 lock.release();

 }

}

InputStream in = (...);

try {

 while (true) {

 int b = in.read();

 if (b == -1)

  break;

 (... process b ...)

 }

} finally {

 in.close();

}

InputStream in = (...);

try {

 byte[] buf = new byte[100];

 while (true) {

 int n = in.read(buf);

 if (n == -1)

  break;

 (... process buf with offset=0 and length=n ...)

 }

} finally {

 in.close();

}

BufferedReader in = new BufferedReader(

 new InputStreamReader(new FileInputStream(...), "UTF-8"));

try {

 while (true) {

 String line = in.readLine();

 if (line == null)

  break;

 (... process line ...)

 }

} finally {

 in.close();

}

PrintWriter out = new PrintWriter(

 new OutputStreamWriter(new FileOutputStream(...), "UTF-8"));

try {

 out.print("Hello ");

 out.print(42);

 out.println(" world!");

} finally {

 out.close();

}