Added 7th program

Inter7.java

@@ -0,0 +1,27 @@
+// 7. Write a java program for inter thread communication using wait(), notify(), notifyall()
+class TotalEarnings extends Thread{
+	int total = 0;
+	public void run(){
+		synchronized(this){
+			for(int i=1; i<=10;i++){
+				total = total + 10;
+			}
+		       this.notify();
+		}
+	}
+}
+
+
+public class Inter7 {
+	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);
+		}
+	}
+}
+
+		
+