matrixmultiplication.java

lab1为多线程计算圆周率的程序 lab2为多线程计算矩阵乘法的程序 有实验报告和说明文档

package lab2;

public class MatrixMultiplication {
	
	
	int r1 = 600;
	int c1 = 600;
	int r2 = 600;
	int c2 = 600;
	long m1[][] = new long[r1][c1];
	long m2[][] = new long[r2][c2];
	
	private long r[][] = new long[r1][c2];
	
	MatrixMultiplication() {
		int v1=0;
		int v2=1;
		for(int i=0;i<r1;i++) {
			for(int j=0;j<c1;j++)
			{
				m1[i][j] = v1;
				v1 = v1+2;
			}
		}
		for(int i=0;i<r1;i++) {
			for(int j=0;j<c1;j++)
			{
				m2[i][j] = v2;
				v2 = v2+2;
			}
		}
		
		for(int k=0;k<r1;k++){
			for(int h=0;h<c2;h++) {
				r[k][h]=0;
			}
		}
		
	}
	
	public void caculate() {
		int i;
		int j;
		int k;
		for(i=0;i<r1;i++) {
			for(j=0;j<c2;j++) {
				for(k=0;k<r2;k++) {
					r[i][j] = m1[i][k]*m2[k][j]+r[i][j];
				}
			}
		}
	}
	public void display() {
		for(int k=0;k<r1;k++) {
			for(int h=0;h<c2;h++)
			{
				System.out.print(r[k][h]+" ");
			}
			System.out.println();
		}
		
	}
	public static void main(String[] args) {
		
		long time1;
		long time2;
		
		time1 = System.currentTimeMillis();
		MatrixMultiplication ob = new MatrixMultiplication();
		ob.caculate();
		time2 = System.currentTimeMillis();
		ob.display();
		
		System.out.println(time2-time1);
		
	}

}