简单的java代码例子

简单的java代码例子
Java是一门广泛应用的编程语言，下面为大家提供一些简单的Java代码例子：
1. HelloWorld程序
public class HelloWorld {
public static void main(String[] args) {
System.out.println('Hello, World');
}
}
2. 计算器程序
import java.util.Scanner;
public class Calculator {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
System.out.print('Enter the first number: ');
int num1 = in.nextInt();
System.out.print('Enter the second number: ');
int num2 = in.nextInt();
System.out.println('Sum: ' + (num1 + num2));
System.out.println('Difference: ' + (num1 - num2));
System.out.println('Product: ' + (num1 * num2));
System.out.println('Quotient: ' + (num1 / num2));
}
}
3. 猜数字游戏
import java.util.Random;
import java.util.Scanner;
public class GuessNumber {
public static void main(String[] args) {
Random rand = new Random();
int numberToGuess = rand.nextInt(100) + 1;
Scanner in = new Scanner(System.in);
int guess;
int tries = 0;
do {
System.out.print('Enter your guess (1-100): '); guess = in.nextInt();
tries++;
if (guess > numberToGuess) {
System.out.println('Too high');
} else if (guess < numberToGuess) {
System.out.println('Too low');
}
} while (guess != numberToGuess);
System.out.println('Congratulations, you guessed the number in ' + tries + ' tries');
}
}
以上是几个简单的Java代码例子，希望对初学者有所帮助。