How to write code in Java?

2 years ago
Isabella Edwards
1 minute

Java is an object-oriented programming language, here are some basic code examples:

  1. Print “Hello World”:
public class HelloWorld {
    public static void main(String[] args) {
        System.out.println("Hello World!");
    }
}
  1. Define a class and method:
public class MyClass {
    public static void main(String[] args) {
        MyClass myObject = new MyClass();
        myObject.myMethod();
    }
    
    public void myMethod() {
        System.out.println("This is my method!");
    }
}
  1. Define variables and control structures.
public class MyProgram {
    public static void main(String[] args) {
        int x = 5;
        if (x > 0) {
            System.out.println("x is positive.");
        } else {
            System.out.println("x is negative or zero.");
        }
    }
}
  1. Circular structure:
public class MyProgram {
    public static void main(String[] args) {
        for (int i = 0; i < 5; i++) {
            System.out.println("Iteration: " + i);
        }
    }
}
  1. Use an array:
public class MyProgram {
    public static void main(String[] args) {
        int[] numbers = {1, 2, 3, 4, 5};
        for (int i = 0; i < numbers.length; i++) {
            System.out.println("Number: " + numbers[i]);
        }
    }
}

These are just some basic examples; Java is a very powerful and flexible programming language that can be used to develop various types of applications.

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