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在Java中,Vector是一个动态数组,可以用来存储和操作矩阵数据
import java.util.Vector;
public static Vector<Vector<Integer>> addMatrices(Vector<Vector<Integer>> matrix1, Vector<Vector<Integer>> matrix2) {
int rows = matrix1.size();
int cols = matrix1.get(0).size();
Vector<Vector<Integer>> result = new Vector<>(rows);
for (int i = 0; i < rows; i++) {
Vector<Integer> row = new Vector<>(cols);
for (int j = 0; j < cols; j++) {
row.add(matrix1.get(i).get(j) + matrix2.get(i).get(j));
}
result.add(row);
}
return result;
}
public static Vector<Vector<Integer>> multiplyMatrices(Vector<Vector<Integer>> matrix1, Vector<Vector<Integer>> matrix2) {
int rows1 = matrix1.size();
int cols1 = matrix1.get(0).size();
int cols2 = matrix2.get(0).size();
Vector<Vector<Integer>> result = new Vector<>(rows1);
for (int i = 0; i < rows1; i++) {
Vector<Integer> row = new Vector<>(cols2);
for (int j = 0; j < cols2; j++) {
int sum = 0;
for (int k = 0; k < cols1; k++) {
sum += matrix1.get(i).get(k) * matrix2.get(k).get(j);
}
row.add(sum);
}
result.add(row);
}
return result;
}
public static void printMatrix(Vector<Vector<Integer>> matrix) {
for (Vector<Integer> row : matrix) {
for (int value : row) {
System.out.print(value + " ");
}
System.out.println();
}
}
public static void main(String[] args) {
Vector<Vector<Integer>> matrix1 = new Vector<>();
matrix1.add(new Vector<>(Arrays.asList(1, 2, 3)));
matrix1.add(new Vector<>(Arrays.asList(4, 5, 6)));
matrix1.add(new Vector<>(Arrays.asList(7, 8, 9)));
Vector<Vector<Integer>> matrix2 = new Vector<>();
matrix2.add(new Vector<>(Arrays.asList(9, 8, 7)));
matrix2.add(new Vector<>(Arrays.asList(6, 5, 4)));
matrix2.add(new Vector<>(Arrays.asList(3, 2, 1)));
System.out.println("Matrix 1:");
printMatrix(matrix1);
System.out.println("Matrix 2:");
printMatrix(matrix2);
Vector<Vector<Integer>> sum = addMatrices(matrix1, matrix2);
System.out.println("Sum of matrices:");
printMatrix(sum);
Vector<Vector<Integer>> product = multiplyMatrices(matrix1, matrix2);
System.out.println("Product of matrices:");
printMatrix(product);
}
这个示例展示了如何使用Java Vector进行矩阵加法和乘法运算。你可以根据需要修改这些方法以适应不同类型的矩阵(例如,使用double类型表示浮点数矩阵)。
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