6 and 7th

MovieBook.java

@@ -0,0 +1,24 @@
+// 7: write a java program for interthread communication using wait(), notify(), notifyAll()
+class TotalEarnings extends Thread{
+  int total = 0;
+  public void run(){
+    synchronized(this){
+      for(int i=0;i<=10;i++){
+        total = total + 100;
+      }
+      this.notify();
+    }
+  }
+}
+
+public class MovieBook{
+  public static void main(String[] args) throws InterruptedException{
+    TotalEarnings te = new TotalEarnings();
+    te.start();
+    synchronized(te){
+      te.wait();
+      System.out.println("total earnings: " + te.total); 
+
+    }
+  }
+}

Sync6.java

@@ -0,0 +1,44 @@
+// 6 write a program for demonstrating thread synchronization.
+class Table {
+  synchronized void printTable(int n) {
+    for(int i = 1; i<=5; i++) {
+      System.out.println(n * i);
+      try{
+        Thread.sleep(400);
+      }catch(Exception e){
+        System.out.println(e);
+      }
+    }
+  }
+}
+
+class Thread1 extends Thread{
+  Table t;
+  Thread1(Table t){
+    this.t = t;
+  }
+  public void run(){
+    t.printTable(5);
+  }
+}
+
+class Thread2 extends Thread{
+  Table t;
+  Thread2(Table t){
+    this.t = t;
+  }
+  public void run(){
+    t.printTable(100);
+
+  }
+}
+
+class Sync6{
+  public static void main(String arg[]){
+    Table obj = new Table();
+    Thread1 t1 = new Thread1(obj);
+    Thread2 t2 = new Thread2(obj);
+    t1.start();
+    t2.start();
+  }
+}