Chapter 10: Problem 20

You wish to add a string to the end of the existing contents of a StringBuilder object. What method do you use?

Short Answer

Expert verified

Answer: The method used is `append()`.

Step by step solution

1. Identifying the correct class and method

To solve this exercise, we need to first identify the correct class that contains the method required. In this case, it is the 'StringBuilder' class in Java. The task is to add a string to the end of the existing contents, and the method we need to use is 'append()'.

2. Syntax of the append() method in StringBuilder

The syntax of using the append() method in the StringBuilder class is as follows: ```java StringBuilder_object.append(STRING); ``` Where 'StringBuilder_object' refers to the instance of the StringBuilder class, and 'STRING' refers to the string that needs to be appended.

3. Demonstrating the append() method with an example

Let's assume we have the following setup: ```java StringBuilder sb = new StringBuilder("Hello"); ``` Now we wish to append " World!" to the existing content of 'sb'. We will use the append() method as follows: ```java sb.append(" World!"); ``` After execution of the above line, the contents of 'sb' will be "Hello World!".

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You wish to add a string to the end of the existing contents of a StringBuilder object. What method do you use?

Short Answer

Step by step solution

1. Identifying the correct class and method

2. Syntax of the append() method in StringBuilder

3. Demonstrating the append() method with an example

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