Strings

Question 1

Strings

Answer 1

• can be instantiated in two ways
• recycled by the JVM instead of creating new ones every time
• immutable in Java (cannot be change dance they’re created)
• using the new keyword forces the JVM to create a new object (not recycle)

Question 2

API

Answer 2

Application Programming Interface

-a library of functions you can use to interact with a program or component

Question 3

Methods

Answer 3

• string.length()
• string.toUpperCase()
• string.toLowerCase()
• string.indexOf()
• string.lastIndexOf()
• string.chart(index)
• string.equals(string2)
• -string.equalsIgnorecase(string2))

Question 4

StringBuffer

Answer 4

• mutable string object
• thread-safe
• slows performance

Question 5

StringBuilder

Answer 5

• wrapper for a mutable string
• not thread-safe
• You use a StringBuilder when you are not using threads, or are performing thread control safely somewhere else.