}
public boolean checkSymbol(){
- if (symbol.trim().isEmpty())
+ if ("".equals(symbol.trim()))
return false;
// No bad characters
}
public boolean checkName(){
- if (name.trim().isEmpty())
+ if ("".equals(name.trim()))
return false;
// No characters that could mess things up saving etc
* building the expression.
*/
public boolean checkExpression(){
- if (expression.trim().isEmpty()){
+ if ("".equals(expression.trim())){
return false;
}