Java requires a class for every program. The entry point is public static void main.
Java
Build applications with Java.
1
Hello World
Example
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Output
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Your task: Print "Hello, World!" using System.out.println()
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Output
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What is the entry point method signature in Java?
SUMMARY
In this section, you learned how to print output to the console. Next, you'll learn how to declare variables and work with different data types.
2
Variables and Data Types
Java is statically typed with primitive and reference types.
Example
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Output
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Your task: Create name (String) and experience (int) variables
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Output
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Which of these is NOT a primitive type in Java?
SUMMARY
In this section, you learned how to declare variables and work with different data types. Next, you'll learn how to perform mathematical operations.
3
Arithmetic Operations
Java supports all standard arithmetic operations with specific rules for integer division.
Example
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Output
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Your task: Calculate area and print "Area: {area}"
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Output
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What is the result of 17 / 5 in Java (both are int)?
SUMMARY
In this section, you learned how to perform mathematical operations. Next, you'll learn how to manipulate and work with strings.
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Locked lessons:
- String Operations
- Conditionals
- For Loops
- While and Do-While
- Methods
- Arrays
- ArrayList
- Classes and Objects
- Final Project: Student Grade System