Create Print Zero Even Odd.java

varunu28 · web-flow · commit aea67f15b6b9 · 2022-02-23T15:58:06.000-08:00
diff --git a/Concurrency/Print Zero Even Odd.java b/Concurrency/Print Zero Even Odd.java
@@ -0,0 +1,42 @@
+class ZeroEvenOdd {
+  private int n;
+  private int flag = 0;
+
+  public ZeroEvenOdd(int n) {
+    this.n = n;
+  }
+
+  // printNumber.accept(x) outputs "x", where x is an integer.
+  public synchronized void zero(IntConsumer printNumber) throws InterruptedException {
+    for (int i = 0; i < n; i++) {
+      while (flag != 0) {
+        this.wait();
+      }
+      printNumber.accept(0);
+      flag = i % 2 == 0 ? 1 : 2;
+      this.notifyAll();
+    }
+  }
+
+  public synchronized void even(IntConsumer printNumber) throws InterruptedException {
+    for (int i = 2; i <= n; i += 2) {
+      while (flag != 2) {
+        this.wait();
+      }
+      printNumber.accept(i);
+      flag = 0;
+      this.notifyAll();
+    }
+  }
+
+  public synchronized void odd(IntConsumer printNumber) throws InterruptedException {
+    for (int i = 1; i <= n; i += 2) {
+      while (flag != 1) {
+        this.wait();
+      }
+      printNumber.accept(i);
+      flag = 0;
+      this.notifyAll();
+    }
+  }
+}
