← Back to Week 2 Hub

String Methods Explorer

Click any method to see what it does, then try it on your own string

String str = " Hello, World! ";

Length: 17 characters

Choose a Method

.length()

Count characters

.trim()

Remove spaces

.toUpperCase()

All caps

.toLowerCase()

All lowercase

.charAt(i)

Char at index

.indexOf(str)

Find position

.substring(s,e)

Extract piece

.startsWith(s)

Starts with?

.endsWith(s)

Ends with?

.equals(s)

Exact match?

.equalsIgnoreCase()

Match (no case)

.split(delim)

Break apart

Result

Click a method card on the left to see it in action

Try Your Own String

Type any string and click "Use This String" to explore methods on your own text. Click "Reset" to go back to the default.

String Immutability & StringBuilder →