private static void evaluateWhileStatement(TreeNode currentNode) throws FunctionReturned { //Complete this method ArrayList children=currentNode.getChildren(); TreeNode booleanExp=children.get(0); int x =0; boolean condition=evaluateBooleanExpression(booleanExp); while (condition==true) { evaluateBlock(children.get(x)); x++; TreeNode booleanExp=children.get(x); boolean condition=evaluateBooleanExpression(booleanExp); } } private static void evaluateIfStatement(TreeNode currentNode) throws FunctionReturned { //Complete this method ArrayList children=currentNode. getChildren(); TreeNode booleanExp=children.get(0); boolean condition=evaluateBooleanExpression(booleanExp); if (condition==true) { evaluateBlock(children.get(1)); } else { if (children.size()>2) { evaluateBlock(children.get(2)); } }

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The StringBuilder class can be used to create mutable strings. The methods defined in the StringBuilder class are widely used to manipulate and concatenate strings. It is a non-synchronized class which has public methods that can be accessed by multiple threads. It is not thread-safe.