| Term |
Definition |
| class |
A blueprint/container for Java code. Every Java file must have a class. |
| main method |
The starting point of a Java program. The JVM begins running code here. |
| statement |
A single instruction in Java (ends with a semicolon). |
| System.out.println() |
A command that prints text to the screen. |
| curly braces { } |
Used to group code into blocks (class blocks, method blocks). |
| JVM |
Java Virtual Machine. Runs the bytecode on your computer. |
| compiler (javac) |
Translates your .java code into .class bytecode so the JVM can run it. |
| variable |
A name that stores a value in memory. Example: int score = 10; |
| data type |
Tells Java what kind of data a variable will hold (int, double, boolean, String). |
| String |
A sequence of characters surrounded by double quotes. |
| boolean |
A true/false value. |
| method |
A block of code that performs a task. Can take parameters and return values. |
| parameter |
A variable listed inside a method’s parentheses. Example: doStuff(int x) |
| import |
Brings in code from Java libraries so you can use it. Example: import java.util.Scanner; |
| library (API) |
Collections of prewritten code you can use (Scanner, Math, Arrays, etc.). |
| semicolon ; |
Ends most Java statements. |
| comment |
Notes for humans inside code. Ignored by the computer. Example: // hello |