```java

//Java代码示例计算两个整数的和

public class SumCalculator {

public static void main(String[] args) {

int num1 = 15;

int num2 = 27;

int sum = num1 + num2;

System.out.println(两个整数的和为: + sum);

}

}

```

```java

//带用户输入的版本

import java.util.Scanner;

public class SumCalculatorWithInput {

public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

System.out.print(请输入第一个整数: );

int num1 = scanner.nextInt();

System.out.print(请输入第二个整数: );

int num2 = scanner.nextInt();

int sum = num1 + num2;

System.out.println(两个整数的和为: + sum);

scanner.close();

}

}

```

```java

//使用方法封装的版本

public class AdvancedSumCalculator {

public static int calculateSum(int a, int b) {

return a + b;

}

public static void main(String[] args) {

int number1 = 30;

int number2 = 45;

int result = calculateSum(number1, number2);

System.out.println(number1 + + + number2 + = + result);

}

}

```