3． 水仙花数是指其个位、十位和百位上三个数的立方和等于这三位数本身的数，使用java编程求出所有的水仙花数-3. Narcissus is the number of its bits, 10 and 100 on the three cubes and is equal to the three-digit number of their own, using the java programming calculate the number of all the daffodils

java 计算矩阵相乘。采用多线程的方法。单线程与多线程对比 计算量相同，线程数不同。-java calculate the matrix multiplication. Using the method of multi-threaded. Single-threaded and multi-threaded results calculated in the same number of threads.