JAVA PROGRAM • LEVEL 01 — BASICS & INPUT/OUTPUT
Read and Add Two Integers in Java
Learn read and add two integers in java with a complete, compiler-ready Java 17 example.
PROBLEM UNDERSTANDING
Input and expected output
10 15
Sum = 25
COMPLETE JAVA 17 PROGRAM
Complete Java 17 implementation
class Main {
public static void main(String[] args) throws Exception {
java.util.Scanner input = new java.util.Scanner(System.in);
int first = input.nextInt();
int second = input.nextInt();
System.out.println("Sum = " + (first + second));
}
}CURRENT STEP
Select Start to walk through the important lines.
SELECTED LINE
No line selected
EXPECTED OUTPUT FOR THE SAMPLE
Sum = 25
PROGRAM EXPLANATION
Algorithm and explanation
- Read the sample input and convert it into the Java values required for read and add two integers in java.
- Apply Scanner and Addition in the order shown by the program.
- Print the final result and compare it with the documented sample output.
This Java 17 example demonstrates Scanner and Addition through a complete, executable program. The values are intentionally small so students can trace each statement, verify the output, and then modify the example safely in the online compiler.
EFFICIENCY
Time and space complexity
O(1)
O(1)
DEBUGGING CHECKLIST
Common mistakes
Create one Scanner for System.in, read values in the documented order, and use the correct next... method for each type.
Use Scanner with compatible Java types; Java checks types and method signatures at compile time.
Java is case-sensitive, and every statement that requires a semicolon must end with one.