From eff6ed12e6cce9afa5cfb1b7d8c4bb0aac66e46f Mon Sep 17 00:00:00 2001
From: vatsalgosar <vatsalgosar@gmail.com>
Date: Wed, 1 Jul 2020 01:41:39 +0530
Subject: [PATCH] BAEL-4142 (#9622)

- Code snippets for Integer to binary string conversion
---
 .../integerToBinary/IntegerToBinary.java      | 17 ++++++++++++
 .../IntegerToBinaryUnitTest.java              | 27 +++++++++++++++++++
 2 files changed, 44 insertions(+)
 create mode 100644 java-numbers-3/src/main/java/com/baeldung/integerToBinary/IntegerToBinary.java
 create mode 100644 java-numbers-3/src/test/java/com/baeldung/integerToBinary/IntegerToBinaryUnitTest.java

diff --git a/java-numbers-3/src/main/java/com/baeldung/integerToBinary/IntegerToBinary.java b/java-numbers-3/src/main/java/com/baeldung/integerToBinary/IntegerToBinary.java
new file mode 100644
index 0000000000..bd888da9a6
--- /dev/null
+++ b/java-numbers-3/src/main/java/com/baeldung/integerToBinary/IntegerToBinary.java
@@ -0,0 +1,17 @@
+package com.baeldung.integerToBinary;
+
+public class IntegerToBinary {
+    public static String convertIntegerToBinary(int n) {
+        if(n == 0) {
+            return "0";
+        }
+        StringBuilder binaryNumber = new StringBuilder();
+        while (n > 0) {
+            int remainder = n % 2;
+            binaryNumber.append(remainder);
+            n /= 2;
+        }
+        binaryNumber = binaryNumber.reverse();
+        return binaryNumber.toString();
+    }
+}
diff --git a/java-numbers-3/src/test/java/com/baeldung/integerToBinary/IntegerToBinaryUnitTest.java b/java-numbers-3/src/test/java/com/baeldung/integerToBinary/IntegerToBinaryUnitTest.java
new file mode 100644
index 0000000000..38ae79f2f5
--- /dev/null
+++ b/java-numbers-3/src/test/java/com/baeldung/integerToBinary/IntegerToBinaryUnitTest.java
@@ -0,0 +1,27 @@
+package com.baeldung.integerToBinary;
+
+import org.junit.Test;
+import static org.junit.Assert.assertEquals;
+
+public class IntegerToBinaryUnitTest {
+    @Test
+    public void givenAnInteger_whenConvertToBinary_thenGetBinaryString() {
+        int n = 7;
+        String binaryString = IntegerToBinary.convertIntegerToBinary(n);
+        assertEquals("111", binaryString);
+    }
+
+    @Test
+    public void givenAnInteger_whenToBinaryStringCalled_thenGetBinaryString() {
+        int n = 7;
+        String binaryString = Integer.toBinaryString(n);
+        assertEquals("111", binaryString);
+    }
+
+    @Test
+    public void givenAnInteger_whenToStringCalled_thenGetBinaryString() {
+        int n = 7;
+        String binaryString = Integer.toString(n, 2);
+        assertEquals("111", binaryString);
+    }
+}