How to Split a String at the First Space Occurrence in Java

How can I split a string in Java at the first occurrence of a space?

String str = "Hello World, welcome to Java!"; String[] parts = str.split(" ", 2);

In Java, to split a string at the first occurrence of a space, you can use the `String.split()` method with a limit parameter. This method provides a straightforward way to separate a string into an array based on specified delimiters, such as spaces.

String str = "Hello World, welcome to Java!";
int index = str.indexOf(' ');
String firstPart = str.substring(0, index);
String secondPart = str.substring(index + 1);
System.out.println(firstPart); // Outputs: Hello
System.out.println(secondPart); // Outputs: World, welcome to Java!

Causes

• Using regular expressions incorrectly.
• Forgetting to limit the number of splits.

Solutions

• Use the `String.split(String regex, int limit)` method with `limit` set to 2 to ensure that only the first space is considered for splitting.
• Alternatively, use `String.indexOf()` to find the first space and `String.substring()` to manually split the string. Here is how:

Mistake: Not specifying the limit in the split method, resulting in splitting at every space.

Solution: Always set the limit parameter to 2.

Mistake: Not checking if there are any spaces in the string before splitting.

Solution: Use `indexOf()` to ensure there's a space before attempting to split.