将普通二维数组转置交换行和列

阳光穿透心脏的1/2处 2022-03-21 16:54 182阅读 0赞

package homework1_1;
    
    /**
     * @description: ${description}
     * @create: 2019-02-03
     **/
    public class LineAndColumnChange {
        public static double[][] tran1(double[][] a){
            int q=a.length;//行总数
            int w=a[0].length;//列总数
            double[][] b= new double[w][q];
            for (int i=0;i<w;i++){
                for (int j=0;j<q;j++){
                    b[i][j]=a[j][i];
                }
            }
            return b;
        }
        public static void printTransposedMatrix(int[][] matrix) {
            for (int i = 0; i < matrix[0].length; i++) {
                for (int j = 0; j < matrix.length; j++) {
                    System.out.printf("%4d", matrix[j][i]);
                }
                System.out.println();
            }
        }
    
    
        public static void printx(double[][] a){
            for(int i=0;i<a.length;i++){
                for(int j=0;j<a[0].length;j++){
                    System.out.print(a[i][j]);
                    System.out.print("\t");
                }
                System.out.println();
            }
        }
    
        public static void main(String[] args) {
            double [][] a1={
       {1,2},{3,4},{5,6}};
            int [][] a2={
       {1,2,3,4},{3,4,6,7},{5,6,9,8}};
            double[][] tran1 = tran1(a1);
            printTransposedMatrix(a2);
            printx(tran1);
        }
    }

run  
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