multithread.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 MultiThread extends Thread {
	private Matrix matrix = null;
	int num1,num2;
	int start,end;
	
	MultiThread(int n1,int n2,Matrix m) {
		super();
		num1 = n1;
		num2 = n2;
		matrix = m;
		int temp = matrix.r1/n2;
//		System.out.println(temp);
		start = (n1-1)*temp;
        if(num1==num2) {
			end=matrix.r1-1;
		}
        else {
        	end = start+temp-1;	
        }
	}
	public void run() {
		int i;
		int j;
		int k;
		for(i=start;i<=end;i++) {
			for(j=0;j<matrix.c2;j++) {
				for(k=0;k<matrix.r2;k++) {
					matrix.r[i][j] = matrix.m1[i][k]*matrix.m2[k][j]+matrix.r[i][j];
				}
			}
		}
		
	}
	

}