6 and 7th

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();
+  }
+}