AP® Computer Science A glossary

Immutable

Course: AP® Computer Science A Shows up in: Unit 1: Using Objects and Methods

Cannot be changed once created. String objects are immutable: their methods return new strings and never change the original.

Appears in the course and exam description (CED): 1.15.A.3

To keep the result of a String method, store it: w = w.substring(1);.

String w = "data";
w.substring(1);
System.out.println(w);

Output:

data

Related terms

• String
• substring