Create StringBuilder with known size of string

ctongfei · Jul 7, 2021 · 8036da3 · 8036da3
1 parent a9c99a0
commit 8036da3
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/src/main/java/me/tongfei/progressbar/DefaultProgressBarRenderer.java b/src/main/java/me/tongfei/progressbar/DefaultProgressBarRenderer.java
@@ -98,6 +98,9 @@ protected String speed(ProgressState progress, Duration elapsed) {
     }
 
     public String render(ProgressState progress, int maxLength) {
+        if (maxLength <= 0) {
+            return "";
+        }
 
         Instant currTime = Instant.now();
         Duration elapsed = Duration.between(progress.startInstant, currTime);
@@ -126,7 +129,7 @@ public String render(ProgressState progress, int maxLength) {
 
         int length = maxLength - prefixLength - suffixLength;
 
-        StringBuilder sb = new StringBuilder();
+        StringBuilder sb = new StringBuilder(maxLength);
         sb.append(prefix);
 
         // case of indefinite progress bars