BAEL-5681 Add colorful logging (#12794)

core-java-modules/core-java-console/pom.xml

@@ -14,6 +14,14 @@
         <version>0.0.1-SNAPSHOT</version>
     </parent>
 
+    <dependencies>
+        <dependency>
+            <groupId>org.fusesource.jansi</groupId>
+            <artifactId>jansi</artifactId>
+            <version>2.4.0</version>
+        </dependency>
+    </dependencies>
+
     <build>
         <finalName>core-java-console</finalName>
         <resources>

core-java-modules/core-java-console/src/main/java/com/baeldung/color/ColorLogger.java

@@ -0,0 +1,21 @@
+package com.baeldung.color;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class ColorLogger {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(ColorLogger.class);
+
+    public void logDebug(String logging) {
+        LOGGER.debug("\u001B[34m" + logging + "\u001B[0m");
+    }
+
+    public void logInfo(String logging) {
+        LOGGER.info("\u001B[32m" + logging + "\u001B[0m");
+    }
+
+    public void logError(String logging) {
+        LOGGER.error("\u001B[31m" + logging + "\u001B[0m");
+    }
+}

core-java-modules/core-java-console/src/main/java/com/baeldung/color/PrintColor.java

@@ -0,0 +1,60 @@
+package com.baeldung.color;
+
+import static org.fusesource.jansi.Ansi.ansi;
+
+import org.fusesource.jansi.AnsiConsole;
+
+public class PrintColor {
+    
+    public static void main(String[] args) {
+        logColorUsingANSICodes();
+
+        logColorUsingLogger();
+
+        logColorUsingJANSI();
+    }
+
+    private static void logColorUsingANSICodes() {
+        System.out.println("Here's some text");
+        System.out.println("\u001B[31m" + "and now the text is red" + "\u001B[0m");
+        System.out.println("and now back to the default");
+    }
+
+    private static void logColorUsingLogger() {
+        ColorLogger colorLogger = new ColorLogger();
+        colorLogger.logDebug("Some debug logging");
+        colorLogger.logInfo("Some info logging");
+        colorLogger.logError("Some error logging");
+    }
+
+    private static void logColorUsingJANSI() {
+        AnsiConsole.systemInstall();
+
+        System.out.println(ansi().fgRed().a("Some red text").fgYellow().a(" and some yellow text").reset());
+
+        AnsiConsole.systemUninstall();
+    }
+}
+
+/*
+ * More ANSI codes:
+ * 
+ * Always conclude your logging with the ANSI reset code: "\u001B[0m"
+ * 
+ * In each case, replace # with the corresponding number:
+ * 
+ * 0 = black
+ * 1 = red
+ * 2 = green
+ * 3 = yellow
+ * 4 = blue
+ * 5 = purple
+ * 6 = cyan (light blue)
+ * 7 = white
+ * 
+ * \u001B[3#m = color font
+ * \u001B[4#m = color background
+ * \u001B[1;3#m = bold font
+ * \u001B[4;3#m = underlined font
+ * \u001B[3;3#m = italics font (not widely supported, works in VS Code)
+ */