transposematrix.java

// Online Java Compiler
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class Main {
    public static void main(String[] args) {
        int matrix[][]={{1,2,3},{4,5,6},{7,8,9}};
        
        for(int i=0;i<matrix.length;i++)
        {
            for(int j=i+1;j<matrix[i].length;j++){
                int temp=0;
                temp=matrix[i][j];
                matrix[i][j]=matrix[j][i];
                matrix[j][i]=temp;
            }
        }
        int left=0;
        int right=matrix.length-1;
        for(int i=0;i<matrix.length;i++){
            while(left<right){
                int temp=0;
                temp=matrix[i][left];
                matrix[i][left]=matrix[i][right];
                matrix[i][right]=temp;
                
                left++;
                right--;
            }
        }
        
        for(int i=0;i<matrix.length;i++){
            for(int j=0;j<matrix[i].length;j++){
                System.out.println(matrix[i][j]+ " ");
                
            }
            System.out.println();
        }
        
        
        
        
    }
    
}