java实现串行、并行求矩阵
时间: 2023-08-04 14:06:44 浏览: 73
Java可以使用多线程实现矩阵的并行计算,从而提高计算效率。以下是串行和并行求矩阵的Java实现示例:
1. 串行求矩阵
```java
public class SerialMatrix {
public static int[][] multiply(int[][] A, int[][] B) {
int m = A.length, n = A[0].length, p = B[0].length;
int[][] C = new int[m][p];
for (int i = 0; i < m; i++) {
for (int j = 0; j < p; j++) {
for (int k = 0; k < n; k++) {
C[i][j] += A[i][k] * B[k][j];
}
}
}
return C;
}
}
```
2. 并行求矩阵
```java
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.TimeUnit;
public class ParallelMatrix {
public static int[][] multiply(int[][] A, int[][] B) throws InterruptedException {
int m = A.length, n = A[0].length, p = B[0].length;
int[][] C = new int[m][p];
int processors = Runtime.getRuntime().availableProcessors();
ExecutorService executor = Executors.newFixedThreadPool(processors);
for (int i = 0; i < m; i++) {
for (int j = 0; j < p; j++) {
executor.submit(new Task(i, j, A, B, C));
}
}
executor.shutdown();
executor.awaitTermination(1, TimeUnit.HOURS);
return C;
}
private static class Task implements Runnable {
int i, j;
int[][] A, B, C;
public Task(int i, int j, int[][] A, int[][] B, int[][] C) {
this.i = i;
this.j = j;
this.A = A;
this.B = B;
this.C = C;
}
@Override
public void run() {
int n = A[0].length;
for (int k = 0; k < n; k++) {
C[i][j] += A[i][k] * B[k][j];
}
}
}
}
```
上述并行求矩阵的实现使用了Java的线程池和多线程技术,将矩阵的计算任务分配给多个线程并行执行,从而提高了计算效率。
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