CareerCup

public class PrintNumbers {

static int n = 13;

public static void main(String[] args) {

for (int i = 1; i < n; i++) {
int k = n / i;
StringBuilder sb = new StringBuilder("");
for (int j = 1; j <= k; j++) {
if (j == 1) {
sb.append(i);
} else {
sb.append(" + " + i);
}
}
if (i * k < n) {
display(n - (i * k), sb.toString());
} else {
System.out.println(sb.toString());
}
}
}

public static void display(int n, String str) {

for (int i = 1; i <= n; i++) {
StringBuilder sb = new StringBuilder(str);
int k = n / i;
for (int j = 1; j <= k; j++) {
sb.append(" + " + i);
}
if (i * k < n) {
display(n - (i * k), sb.toString());
} else if (i * k == n) {
System.out.println(sb.toString());
}

}
}
}


Output number T=13

1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1 + 1
2 + 2 + 2 + 2 + 2 + 2 + 1
3 + 3 + 3 + 3 + 1
4 + 4 + 4 + 1
5 + 5 + 1 + 1 + 1
5 + 5 + 2 + 1
5 + 5 + 3
6 + 6 + 1
7 + 1 + 1 + 1 + 1 + 1 + 1
7 + 2 + 2 + 2
7 + 3 + 3
7 + 4 + 1 + 1
7 + 4 + 2
7 + 5 + 1
7 + 6
8 + 1 + 1 + 1 + 1 + 1
8 + 2 + 2 + 1
8 + 3 + 1 + 1
8 + 3 + 2
8 + 4 + 1
8 + 5
9 + 1 + 1 + 1 + 1
9 + 2 + 2
9 + 3 + 1
9 + 4
10 + 1 + 1 + 1
10 + 2 + 1
10 + 3
11 + 1 + 1
11 + 2
12 + 1

Natural number series generated using N Thread


public class SeriesGeneratorDemo {
public static final int NUMBER_OF_THREAD = 5;

public static void main(String[] args) {
// TODO code application logic here
SequenceGenerator sequenceGenerator=new SequenceGenerator();
for (int i = 1; i <= NUMBER_OF_THREAD; i++) {
new Thread(sequenceGenerator,i+"").start();
}
}
}
class SequenceGenerator implements Runnable {
private static final int SERIES_MAX_NUMBER = 100;
private static int nextThreadName=1;
private static int nextNumber = 0;

@Override
public void run() {
while (nextNumber < SERIES_MAX_NUMBER) {
synchronized (this) {
int currentThread = Integer.parseInt(Thread.currentThread().getName());
if (currentThread==nextThreadName) {
generateNumber();
if (currentThread < SeriesGeneratorDemo.NUMBER_OF_THREAD) {
nextThreadName = currentThread + 1;
} else {
nextThreadName = 1;
}
this.notifyAll();
} else {
try {
this.wait();
} catch (InterruptedException ex) {
System.out.println(ex);
}
}
}
}
}

public synchronized void generateNumber() {
System.out.println("Thread Name : "+Thread.currentThread().getName()+" value : "+ (++nextNumber));
}
}