Merge pull request eugenp#17571 from anujgaud/ag/formatting-output-us…

…ing-system-out

BAEL-6242 Add TableFormatter

core-java-modules/core-java-io-5/pom.xml

@@ -50,6 +50,11 @@
             <artifactId>jmh-generator-annprocess</artifactId>
             <version>${jmh.version}</version>
         </dependency>
+        <dependency> 
+            <groupId>de.vandermeer</groupId> 
+            <artifactId>asciitable</artifactId> 
+            <version>0.3.2</version> 
+        <dependency>
     </dependencies>
 
     <build>
@@ -81,4 +86,4 @@
         <jmh.version>1.37</jmh.version>
         <maven-resources-plugin.version>3.1.0</maven-resources-plugin.version>
     </properties>
-</project>
+</project>

core-java-modules/core-java-io-5/src/main/java/com/baeldung/tableformatter/TableFormatter.java

@@ -0,0 +1,87 @@
+package com.baeldung.tableformatter;
+
+import de.vandermeer.asciitable.AsciiTable;
+
+public class TableFormatter {
+
+    static void usingStringConcatenation() {
+        String[] headers = {"ID", "Name", "Age"};
+        String[][] data = { 
+            {"1", "James", "24"}, 
+            {"2", "Sarah", "27"}, 
+            {"3", "Keith", "31"} 
+        };
+
+        System.out.println(headers[0] + "   " + headers[1] + "   " + headers[2]);
+
+        for (String[] row : data) {
+            System.out.println(row[0] + "   " + row[1] + "   " + row[2]);
+        }
+    }
+
+    static void usingPrintf() {
+        String[] headers = {"ID", "Name", "Age"};
+        String[][] data = { 
+            {"1", "James", "24"}, 
+            {"2", "Sarah", "27"}, 
+            {"3", "Keith", "31"} 
+        };
+
+        System.out.printf("%-5s %-10s %-5s%n", headers[0], headers[1], headers[2]);
+
+        for (String[] row : data) {
+            System.out.printf("%-5s %-10s %-5s%n", row[0], row[1], row[2]);
+        }
+    }
+
+    static void usingStringFormat() {
+        String[] headers = {"ID", "Name", "Age"};
+        String[][] data = { 
+            {"1", "James", "24"}, 
+            {"2", "Sarah", "27"}, 
+            {"3", "Keith", "31"} 
+        };
+
+        String header = String.format("%-5s %-10s %-5s", headers[0], headers[1], headers[2]);
+        System.out.println(header);
+
+        for (String[] row : data) {
+            String formattedRow = String.format("%-5s %-10s %-5s", row[0], row[1], row[2]);
+            System.out.println(formattedRow);
+        }
+    }
+
+    static void usingStringBuilder() {
+        String[] headers = {"ID", "Name", "Age"};
+        String[][] data = { 
+            {"1", "James", "24"}, 
+            {"2", "Sarah", "27"}, 
+            {"3", "Keith", "31"} 
+        };
+
+        StringBuilder table = new StringBuilder();
+
+        table.append(String.format("%-5s %-10s %-5s%n", headers[0], headers[1], headers[2]));
+
+
+        for (String[] row : data) {
+            table.append(String.format("%-5s %-10s %-5s%n", row[0], row[1], row[2]));
+        }
+
+        System.out.print(table.toString());
+    }
+
+    static void usingAsciiTable() { 
+        AsciiTable table = new AsciiTable(); 
+        table.addRule(); 
+        table.addRow("ID", "Name", "Age"); 
+        table.addRule(); 
+        table.addRow("1", "James", "24"); 
+        table.addRow("2", "Sarah", "27"); 
+        table.addRow("3", "Keith", "31"); 
+        table.addRule(); 
+
+        String renderedTable = table.render(); 
+        System.out.println(renderedTable); 
+    }
+}