用JAVA生成十五道一百以内的加减法运算且不能出现负数，不用输出计算结果

您好，关于您的问题，我可以提供以下JAVA代码来生成十五道一百以内的加减法运算且不能出现负数，不用输出计算结果：

import java.util.Random;

public class GenerateMathOperations {

    public static void main(String[] args) {
        final int NUM_OF_OPERATIONS = 15;
        final int MAX_NUMBER = 100;
        Random r = new Random();
        for (int i = 0; i < NUM_OF_OPERATIONS; i++) {
            // Generate random numbers
            int num1 = r.nextInt(MAX_NUMBER) + 1;
            int num2 = r.nextInt(MAX_NUMBER - num1 + 1);
            // Determine whether to perform addition or subtraction
            boolean isAddition = r.nextBoolean();
            // Output math operation
            if (isAddition) {
                System.out.println(num1 + " + " + num2 + " = ");
            } else {
                System.out.println(num1 + " - " + num2 + " = ");
            }
        }
    }

}

希望能够解决您的问题!