How to concatenate strings in Java.

2 years ago
Noah Thompson
1 minute

There are various ways to concatenate strings in Java.

  1. Using the “+” operator:
  2. Combine the strings “Hello” and “World” into a single string variable named result.
  3. If you use the concat() method of String:
  4. Combine two strings “Hello” and “World” with a space in between into a new string.
  5. Utilize the StringBuilder class:
  6. Create a StringBuilder object, append “Hello”, append a space, append “World”, and store the final result in a String variable.
  7. Using the StringBuffer class (the thread-safe version):
  8. A new StringBuffer is created, followed by the append of “Hello” and a space and “World”. Finally, the result is converted to a string stored in the variable ‘result’.

– Utilizing the “+” operator and concat() method will generate a new string object, whereas using the StringBuilder and StringBuffer classes allows for concatenation on the existing object, resulting in higher efficiency. It is recommended to use the StringBuilder or StringBuffer classes when frequent string concatenation is needed in loops to improve performance.

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