JAVA classes/constructors question

[csgirl504]

Homework Statement

I just have a quick question and hope I can ask it clearly. If I am writing a constructor for a class that takes in one value as an argument, but the value is two words, how can I extract the first and second word?

For example, if I wrote a class called Name and my constructor looked like this:

Name(String firstLast)

And the value sent in was John Smith

How would I extract John and store it in its own variable? Is this even possible?

Homework Equations

The Attempt at a Solution

 

[I like Serena]

Homework Statement

I just have a quick question and hope I can ask it clearly. If I am writing a constructor for a class that takes in one value as an argument, but the value is two words, how can I extract the first and second word?

For example, if I wrote a class called Name and my constructor looked like this:

Name(String firstLast)

And the value sent in was John Smith

How would I extract John and store it in its own variable? Is this even possible?

Hi csgirl504!

The java String class has a method called split() that can do that.

 

[csgirl504]

I figured it out! Thanks! :)

 

[I like Serena]

Good! ;)

 

[DeeNos]

There are a few different ways you could approach this problem, depending on your specific needs and preferences. Here are a few potential solutions:

1. Use the String.split() method: This method splits a string into an array of substrings based on a specified delimiter. In this case, you could use a space (" ") as the delimiter and then store the first and second words in separate variables. For example:

String[] fullName = firstLast.split(" ");
String firstName = fullName[0];
String lastName = fullName[1];

2. Use the String.indexOf() and String.substring() methods: The indexOf() method returns the index of a specified character or substring within a string. You could use this to find the index of the space between the first and last name, and then use the substring() method to extract the first and last name. For example:

int spaceIndex = firstLast.indexOf(" ");
String firstName = firstLast.substring(0, spaceIndex);
String lastName = firstLast.substring(spaceIndex + 1);

3. Use a StringTokenizer: This is a class specifically designed for breaking a string into smaller pieces based on a specified delimiter. It can be useful if you need to extract multiple words or if your string may contain multiple delimiters. For example:

StringTokenizer st = new StringTokenizer(firstLast);
String firstName = st.nextToken();
String lastName = st.nextToken();

Overall, there are many different ways you could approach this problem, and the best solution will depend on your specific needs and preferences. I recommend doing some research and experimenting with different methods to find the one that works best for your situation.