diff --git a/src/the/bytecode/club/bytecodeviewer/BytecodeViewer.java b/src/the/bytecode/club/bytecodeviewer/BytecodeViewer.java
index 92fd797d..9c3641d3 100644
--- a/src/the/bytecode/club/bytecodeviewer/BytecodeViewer.java
+++ b/src/the/bytecode/club/bytecodeviewer/BytecodeViewer.java
@@ -833,10 +833,7 @@ public class BytecodeViewer {
 								} else if (fn.endsWith(".class")) {
 									try {
 										byte[] bytes = JarUtils.getBytes(new FileInputStream(f));
-										String cafebabe = String.format("%02X", bytes[0])
-												+ String.format("%02X", bytes[1])
-												+ String.format("%02X", bytes[2])
-												+ String.format("%02X", bytes[3]);
+										String cafebabe = String.format("%02X%02X%02X%02X", bytes[0], bytes[1], bytes[2], bytes[3]);
 										if(cafebabe.toLowerCase().equals("cafebabe")) {
 											final ClassNode cn = JarUtils.getNode(bytes);
 											
diff --git a/src/the/bytecode/club/bytecodeviewer/JarUtils.java b/src/the/bytecode/club/bytecodeviewer/JarUtils.java
index 21f5d537..d9df2540 100644
--- a/src/the/bytecode/club/bytecodeviewer/JarUtils.java
+++ b/src/the/bytecode/club/bytecodeviewer/JarUtils.java
@@ -104,10 +104,7 @@ public class JarUtils {
 				final String name = entry.getName();
 				if (name.endsWith(".class")) {
 					byte[] bytes = getBytes(jis);
-					String cafebabe = String.format("%02X", bytes[0])
-							+ String.format("%02X", bytes[1])
-							+ String.format("%02X", bytes[2])
-							+ String.format("%02X", bytes[3]);
+					String cafebabe = String.format("%02X%02X%02X%02X", bytes[0], bytes[1], bytes[2], bytes[3]);
 					if(cafebabe.toLowerCase().equals("cafebabe")) {
 						try {
 							final ClassNode cn = getNode(bytes);