Initial data commit

Task/Generator-Exponential/Java/generator-exponential.java

@@ -0,0 +1,53 @@
+import java.util.function.LongSupplier;
+import static java.util.stream.LongStream.generate;
+
+public class GeneratorExponential implements LongSupplier {
+    private LongSupplier source, filter;
+    private long s, f;
+
+    public GeneratorExponential(LongSupplier source, LongSupplier filter) {
+        this.source = source;
+        this.filter = filter;
+        f = filter.getAsLong();
+    }
+
+    @Override
+    public long getAsLong() {
+        s = source.getAsLong();
+
+        while (s == f) {
+            s = source.getAsLong();
+            f = filter.getAsLong();
+        }
+
+        while (s > f) {
+            f = filter.getAsLong();
+        }
+
+        return s;
+    }
+
+    public static void main(String[] args) {
+        generate(new GeneratorExponential(new SquaresGen(), new CubesGen()))
+                .skip(20).limit(10)
+                .forEach(n -> System.out.printf("%d ", n));
+    }
+}
+
+class SquaresGen implements LongSupplier {
+    private long n;
+
+    @Override
+    public long getAsLong() {
+        return n * n++;
+    }
+}
+
+class CubesGen implements LongSupplier {
+    private long n;
+
+    @Override
+    public long getAsLong() {
+        return n * n * n++;
+    }
+}