Improve performance by replacing StringBuffer with StringBuilder

src/ext/plantuml/com/ctreber/acearth/util/Toolkit.java

@@ -96,7 +96,7 @@ public class Toolkit
   {
     boolean lDoCap = false;
     final StringTokenizer lST = new StringTokenizer(pText, ".- ", true);
-    final StringBuffer lSB = new StringBuffer(50);
+    final StringBuilder lSB = new StringBuilder(50);
     while(lST.hasMoreTokens())
     {
       String lWord = lST.nextToken();

src/ext/plantuml/com/google/zxing/ResultPoint.java

@@ -53,7 +53,7 @@ public class ResultPoint {
   }
 
   public String toString() {
-    StringBuffer result = new StringBuffer(25);
+    StringBuilder result = new StringBuilder(25);
     result.append('(');
     result.append(x);
     result.append(',');

src/ext/plantuml/com/google/zxing/common/BitArray.java

@@ -234,7 +234,7 @@ public final class BitArray {
   }
   
   public String toString() {
-    StringBuffer result = new StringBuffer(size);
+    StringBuilder result = new StringBuilder(size);
     for (int i = 0; i < size; i++) {
       if ((i & 0x07) == 0) {
         result.append(' ');

src/ext/plantuml/com/google/zxing/common/BitMatrix.java

@@ -213,7 +213,7 @@ public final class BitMatrix {
   }
 
   public String toString() {
-    StringBuffer result = new StringBuffer(height * (width + 1));
+    StringBuilder result = new StringBuilder(height * (width + 1));
     for (int y = 0; y < height; y++) {
       for (int x = 0; x < width; x++) {
         result.append(get(x, y) ? "X " : "  ");

src/ext/plantuml/com/google/zxing/common/reedsolomon/GF256Poly.java

@@ -224,7 +224,7 @@ final class GF256Poly {
   }
 
   public String toString() {
-    StringBuffer result = new StringBuffer(8 * getDegree());
+    StringBuilder result = new StringBuilder(8 * getDegree());
     for (int degree = getDegree(); degree >= 0; degree--) {
       int coefficient = getCoefficient(degree);
       if (coefficient != 0) {

src/ext/plantuml/com/google/zxing/qrcode/encoder/ByteMatrix.java

@@ -74,7 +74,7 @@ public final class ByteMatrix {
   }
 
   public String toString() {
-    StringBuffer result = new StringBuffer(2 * width * height + 2);
+    StringBuilder result = new StringBuilder(2 * width * height + 2);
     for (int y = 0; y < height; ++y) {
       for (int x = 0; x < width; ++x) {
         switch (bytes[y][x]) {

src/ext/plantuml/com/google/zxing/qrcode/encoder/QRCode.java

@@ -140,7 +140,7 @@ public final class QRCode {
 
   // Return debug String.
   public String toString() {
-    StringBuffer result = new StringBuffer(200);
+    StringBuilder result = new StringBuilder(200);
     result.append("<<\n");
     result.append(" mode: ");
     result.append(mode);

src/net/sourceforge/plantuml/StringUtils.java

@@ -468,7 +468,7 @@ public class StringUtils {
 	public static String manageUnicodeNotationUplus(String s) {
 		final Pattern pattern = Pattern.compile("\\<U\\+([0-9a-fA-F]{4,5})\\>");
 		final Matcher matcher = pattern.matcher(s);
-		final StringBuffer result = new StringBuffer();
+		final StringBuilder result = new StringBuilder();
 		while (matcher.find()) {
 			final String num = matcher.group(1);
 			final int value = Integer.parseInt(num, 16);
@@ -482,7 +482,7 @@ public class StringUtils {
 	public static String manageAmpDiese(String s) {
 		final Pattern pattern = Pattern.compile("\\&#([0-9]+);");
 		final Matcher matcher = pattern.matcher(s);
-		final StringBuffer result = new StringBuffer();
+		final StringBuilder result = new StringBuilder();
 		while (matcher.find()) {
 			final String num = matcher.group(1);
 			final char c = (char) Integer.parseInt(num);

src/net/sourceforge/plantuml/asciiart/ComponentTextArrow.java

@@ -92,7 +92,7 @@ public class ComponentTextArrow extends AbstractComponentText implements ArrowCo
 		if (fileFormat == FileFormat.UTXT) {
 			final Pattern pattern = Pattern.compile("\\<b\\>([0-9]+)\\</b\\>");
 			final Matcher matcher = pattern.matcher(s);
-			final StringBuffer result = new StringBuffer();
+			final StringBuilder result = new StringBuilder();
 			while (matcher.find()) {
 				final String num = matcher.group(1);
 				final String replace = StringUtils.toInternalBoldNumber(num);

src/net/sourceforge/plantuml/logo/LogoScanner.java

@@ -109,7 +109,7 @@ class LogoScanner {
 
 	public LogoToken getToken() {
 		final LogoToken token = new LogoToken();
-		final StringBuffer lexeme = new StringBuffer();
+		final StringBuilder lexeme = new StringBuilder();
 
 		if (i >= sourceLength) {
 			token.kind = LogoToken.END_OF_INPUT;

src/net/sourceforge/plantuml/preproc2/PreprocessorUtils.java

@@ -62,7 +62,7 @@ public class PreprocessorUtils {
 		final Pattern p = Pattern.compile("%(\\w+)%");
 
 		final Matcher m = p.matcher(s);
-		final StringBuffer sb = new StringBuffer();
+		final StringBuilder sb = new StringBuilder();
 		while (m.find()) {
 			final String var = m.group(1);
 			final String value = getenv(var);

src/net/sourceforge/plantuml/svg/SvgGraphics.java

@@ -940,7 +940,7 @@ public class SvgGraphics {
 	private String formatTitle(String title) {
 		final Pattern p = Pattern.compile("\\<U\\+([0-9A-Fa-f]+)\\>");
 		final Matcher m = p.matcher(title);
-		final StringBuffer sb = new StringBuffer();
+		final StringBuilder sb = new StringBuilder();
 		while (m.find()) {
 			final String num = m.group(1);
 			final char c = (char) Integer.parseInt(num, 16);

src/net/sourceforge/plantuml/utils/Cypher.java

@@ -80,7 +80,7 @@ public class Cypher {
 	public synchronized String cypher(String s) {
 
 		final Matcher m = p.matcher(s);
-		final StringBuffer sb = new StringBuffer();
+		final StringBuilder sb = new StringBuilder();
 		while (m.find()) {
 			final String word = m.group(0);
 			m.appendReplacement(sb, changeWord(word));

src/org/stathissideris/ascii2image/text/CellSet.java

@@ -97,7 +97,7 @@ public class CellSet implements Iterable<TextGrid.Cell> {
 	}
 
 	public String getCellsAsString(){
-		StringBuffer str = new StringBuffer();
+		StringBuilder str = new StringBuilder();
 		Iterator<TextGrid.Cell> it = iterator();
 		while(it.hasNext()){
 			str.append(it.next().toString());