Explanation of Solution
Method:
//define a method
public String toString() {
//condition initialized to check whether the string is empty or not
if (isEmpty()) {
//return statement
return "[]";
} else {
//declare the required variables
String result = "[";
//loop initialized to verify the value of "front"
for (Node front : elementData) {
//assign the value
Node current = front;
//loop initialized till the value of current is not equal to null
while (current != null) {
//condition initialized to check whether the length of the result is greater than 1
if (result.length() > 1) {
//assign the value
result += ", ";
}
//evaluate the values
result += current...
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