+ this.label = label;\r
+ }\r
+ \r
+ public Expression (String expressionString) {\r
+ StringTokenizer tokenizer = new StringTokenizer(expressionString,"=");\r
+ this.leftEntity = tokenizer.nextToken();\r
+ this.operator = "=";\r
+ this.rightEntity = tokenizer.nextToken();\r
+ this.label=rightEntity;\r