X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=core%2Fsrc%2Fnet%2Fsf%2Fopenrocket%2Fsimulation%2Fcustomexpression%2FCustomExpression.java;h=40b3d700c4a76686980b324a7ea845648ff89067;hb=92cb639463fcd6c3e7a8e8a68082b960861eeda7;hp=ddafd9bf0624bad8d42ee25c8b8ff2c172a84c3b;hpb=f6930d99aa29466c4e5550330276af73727b6bf8;p=debian%2Fopenrocket

diff --git a/core/src/net/sf/openrocket/simulation/customexpression/CustomExpression.java b/core/src/net/sf/openrocket/simulation/customexpression/CustomExpression.java
index ddafd9bf..40b3d700 100644
--- a/core/src/net/sf/openrocket/simulation/customexpression/CustomExpression.java
+++ b/core/src/net/sf/openrocket/simulation/customexpression/CustomExpression.java
@@ -200,7 +200,7 @@ public class CustomExpression implements Cloneable{
 	}
 	
 	public boolean checkSymbol(){
-		if (symbol.trim().isEmpty())
+		if ("".equals(symbol.trim()))
 			return false;
 		
 		// No bad characters
@@ -226,7 +226,7 @@ public class CustomExpression implements Cloneable{
 	}
 	
 	public boolean checkName(){
-		if (name.trim().isEmpty())
+		if ("".equals(name.trim()))
 			return false;
 		
 		// No characters that could mess things up saving etc
@@ -275,7 +275,7 @@ public class CustomExpression implements Cloneable{
 	 * building the expression.
 	 */
 	public boolean checkExpression(){
-		if (expression.trim().isEmpty()){
+		if ("".equals(expression.trim())){
 			return false;
 		}