Java Cheatsheet
☕ Java Basics // Hello World
public class HelloWorld {
public static void main(String[] args) {
System.out.println("Hello, World!");
}
} ๐ก Tip: Every Java program starts with a main method inside a class. ๐ฆ Variables & Data Types int age = 25;
double price = 99.99;
char grade = 'A';
boolean isActive = true;
String name = "Maxon"; ๐ก Tip: Use wrapper classes (Integer, Double, etc.) for objects and generics. ๐ Control Flow int num = 10;
// if-else
if (num > 5) {
System.out.println("Greater than 5");
} else {
System.out.println("Less or equal to 5");
}
// switch
switch (num) {
case 5: System.out.println("Five"); break;
case 10: System.out.println("Ten"); break;
default: System.out.println("Other");
}
๐ก Tip: Use switch for cleaner multi-condition checks. ๐ Loops // for loop
for (int i = 0; i < 5; i++) {
System.out.println(i);
}
// while loop
int j = 0;
while (j < 5) {
System.out…