Initial Commit

Author: Arpit Aggarwal

.gitignore

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+bin
+.project
+.classpath
+.settings/

src/com/test/factory/Add.java

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+package com.test.factory;
+
+public class Add implements Operation {
+
+	@Override
+	public int execute(final int x, final int y) {
+		return x + y;
+	}
+
+}

src/com/test/factory/Divide.java

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+package com.test.factory;
+
+public class Divide implements Operation {
+
+	@Override
+	public int execute(final int x, final int y) {
+		return x / y;
+	}
+
+}

src/com/test/factory/Main.java

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+package com.test.factory;
+
+public class Main {
+
+	public static void main(String[] args) {
+		String operation = "add";
+		String nextOperation = "subtract";
+		Operation add = OperationFactory.getOperation(operation);
+		System.out.println(add.execute(20, 10));
+		Operation subtract = OperationFactory.getOperation(nextOperation);
+		System.out.println(subtract.execute(20, 10));
+	}
+
+}

src/com/test/factory/Multiply.java

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+package com.test.factory;
+
+public class Multiply implements Operation {
+
+	@Override
+	public int execute(final int x, final int y) {
+		return x * y;
+	}
+
+}

src/com/test/factory/Operation.java

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+package com.test.factory;
+
+@FunctionalInterface
+public interface Operation {
+	int execute(final int x, final int y);
+}

src/com/test/factory/OperationFactory.java

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+package com.test.factory;
+
+public class OperationFactory {
+
+	public static Operation getOperation(String operation) {
+		switch (operation) {
+		case "add":
+			return new Add()::execute;
+		case "subtract":
+			return new Subtract()::execute;
+		case "multiply":
+			return new Multiply()::execute;
+		case "divide":
+			return new Divide()::execute;
+		default:
+			return null;
+		}
+	}
+}

src/com/test/factory/Subtract.java

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+package com.test.factory;
+
+public class Subtract implements Operation {
+
+	@Override
+	public int execute(final int x, final int y) {
+		return x - y;
+	}
+
+}

src/com/test/programs/FizzBuzz.java

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+package com.test.programs;
+
+import java.util.function.IntPredicate;
+import java.util.stream.IntStream;
+
+public class FizzBuzz {
+
+	private static final IntPredicate fizz = (x) -> x % 3 == 0;
+	private static final IntPredicate buzz = (x) -> x % 5 == 0;
+
+	public static void main(String[] args) {
+		IntStream.range(1, 100).boxed().map(element -> {
+			if (fizz.and(buzz).test(element)) {
+				return "Fizz Buzz";
+			} else if (fizz.test(element)) {
+				return "Fizz";
+			} else if (buzz.test(element)) {
+				return "Buzz";
+			}
+			return element;
+		}).forEach(System.out::println);
+		
+	}
+}

src/com/test/so/solutions/AlphabetsLooping.java

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+package com.test.so.solutions;
+
+import java.util.stream.IntStream;
+
+public class AlphabetsLooping {
+	static final String input = "hello";
+
+	public static void main(String[] args) {
+		StringBuilder builder = new StringBuilder("");
+		input.chars().mapToObj(i -> builder.append((char) i))
+				.forEach(System.out::println);
+
+		System.out.println("********");
+
+		IntStream.range(0, input.length())
+				.mapToObj(index -> input.substring(0, index + 1))
+				.forEach(System.out::println);
+	}
+}