From 082aa7d0a6a369407a589499b57b06f0f4516fc8 Mon Sep 17 00:00:00 2001
From: dupirefr <dupire.francois+pro@gmail.com>
Date: Sat, 8 Jun 2019 22:19:02 +0200
Subject: [PATCH] [BAEL-2996] Added la4j library example

---
 libraries-2/pom.xml                           |  6 +++
 ...iTest.java => DoubleMatrix2DUnitTest.java} |  2 +-
 .../baeldung/la4j/Basic2DMatrixUnitTest.java  | 39 +++++++++++++++++++
 3 files changed, 46 insertions(+), 1 deletion(-)
 rename libraries-2/src/test/java/com/baeldung/colt/{DoubleMatrix2DUniTest.java => DoubleMatrix2DUnitTest.java} (97%)
 create mode 100644 libraries-2/src/test/java/com/baeldung/la4j/Basic2DMatrixUnitTest.java

diff --git a/libraries-2/pom.xml b/libraries-2/pom.xml
index b936465e82..aca47f957d 100644
--- a/libraries-2/pom.xml
+++ b/libraries-2/pom.xml
@@ -60,6 +60,11 @@
 			<artifactId>colt</artifactId>
 			<version>${colt.version}</version>
 		</dependency>
+		<dependency>
+			<groupId>org.la4j</groupId>
+			<artifactId>la4j</artifactId>
+			<version>${la4j.version}</version>
+		</dependency>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter</artifactId>
@@ -121,5 +126,6 @@
 		<spring-boot-starter.version>2.1.4.RELEASE</spring-boot-starter.version>
 		<ejml.version>0.37.1</ejml.version>
 		<colt.version>1.2.0</colt.version>
+		<la4j.version>0.6.0</la4j.version>
 	</properties>
 </project>
diff --git a/libraries-2/src/test/java/com/baeldung/colt/DoubleMatrix2DUniTest.java b/libraries-2/src/test/java/com/baeldung/colt/DoubleMatrix2DUnitTest.java
similarity index 97%
rename from libraries-2/src/test/java/com/baeldung/colt/DoubleMatrix2DUniTest.java
rename to libraries-2/src/test/java/com/baeldung/colt/DoubleMatrix2DUnitTest.java
index 54d10e8cef..d88d1a150a 100644
--- a/libraries-2/src/test/java/com/baeldung/colt/DoubleMatrix2DUniTest.java
+++ b/libraries-2/src/test/java/com/baeldung/colt/DoubleMatrix2DUnitTest.java
@@ -7,7 +7,7 @@ import org.junit.jupiter.api.Test;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
-class DoubleMatrix2DUniTest {
+class DoubleMatrix2DUnitTest {
 
     @Test
     void givenTwoMatrices_whenMultiply_thenMultiplicatedMatrix() {
diff --git a/libraries-2/src/test/java/com/baeldung/la4j/Basic2DMatrixUnitTest.java b/libraries-2/src/test/java/com/baeldung/la4j/Basic2DMatrixUnitTest.java
new file mode 100644
index 0000000000..cf0f132cae
--- /dev/null
+++ b/libraries-2/src/test/java/com/baeldung/la4j/Basic2DMatrixUnitTest.java
@@ -0,0 +1,39 @@
+package com.baeldung.la4j;
+
+import org.junit.jupiter.api.Test;
+import org.la4j.Matrix;
+import org.la4j.matrix.dense.Basic2DMatrix;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class Basic2DMatrixUnitTest {
+
+    @Test
+    void givenTwoMatrices_whenMultiply_thenMultiplicatedMatrix() {
+        Matrix firstMatrix = new Basic2DMatrix(
+          new double[][]{
+            new double[]{1d, 5d},
+            new double[]{2d, 3d},
+            new double[]{1d, 7d}
+          });
+
+        Matrix secondMatrix = new Basic2DMatrix(
+          new double[][]{
+            new double[]{1d, 2d, 3d, 7d},
+            new double[]{5d, 2d, 8d, 1d}
+          }
+        );
+
+        Matrix expected = new Basic2DMatrix(
+          new double[][]{
+            new double[]{26d, 12d, 43d, 12d},
+            new double[]{17d, 10d, 30d, 17d},
+            new double[]{36d, 16d, 59d, 14d}
+          }
+        );
+
+        Matrix actual = firstMatrix.multiply(secondMatrix);
+
+        assertThat(actual).isEqualTo(expected);
+    }
+}