Re: Beginner needs help using a array of class objects, and quick

Dear Cynthiaw,
I just read your Beginner needs help using a array of class objects, and quick of Dec 7, 2006 9:25 PM . I really like your nice example.
I also want to put a question on the forum and display the source code of my classe in a pretty way as you did : with colors, indentation, ... But how ? In html, I assume. How did you generate the html code of your three classes ? By help of your IDE ? NetBeans ? References ?
I already posted my question with six source code classes ... in text mode --> Awful : See "Polymorphism did you say ?"
Is there a way to discard and replace a post (with html source code) in the Sun forum ?
Thanks for your help.
Chavada

chavada wrote:
Dear Cynthiaw,
I just read your Beginner needs help using a array of class objects, and quick of Dec 7, 2006 9:25 PM . I really like your nice example.You think she's still around almost a year later?
I also want to put a question on the forum and display the source code of my classe in a pretty way as you did : with colors, indentation, ... But how ?Just use [code] and [/code] around it, or use the CODE button
[code]
public class Foo() {
* This is the bar method
public void bar() {
// do stuff
}[/code]

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Need Help in trying to understand class objects

I need help on understanding following problem.I have two files for that, which are as follows:
first file
public class Matrix extends Object {
     private int matrixData[][];     // integer array to store integer data
     private int    rowMatrix;     // number of rows
     private int    colMatrix;     // number of columns
     public Matrix( int m, int n )
     {       /*Constructor: initializes rowMatrix and colMatrix,
          and creates a double subscripted integer array matrix
          of rowMatrix rows and colMatrixm columns. */
          rowMatrix = m;
          colMatrix = n;
          matrixData = new int[rowMatrix][colMatrix];
     public Matrix( int data[][] )
     {     /* Constructor: creates a double subscripted integer array
          and initilizes the array using values of data[][] array. */
          rowMatrix = data.length;
          colMatrix = data[0].length;
          matrixData = new int [rowMatrix][colMatrix];
          for(int i=0; i<rowMatrix; i++)
               for(int j=0; j<colMatrix; j++)
                    matrixData[i][j] = data[i][j];
     public int getElement( int i, int j)
     {      /* returns the element at the ith row and jth column of
          this matrix. */
          return matrixData[i][j];
     public boolean setElement( int x, int i, int j)
     {     /* sets to x the element at the ith row and jth column
          of this matrix; this method should also check the
          consistency of i and j (i.e., if i and j are in the range
          required for subscripts; only in this situation the operation
          can succeed); the method should return true if the operation
          succeeds, and should return false otherwise.
          for(i=0;i<rowMatrix;i++){
               for(j=0;j<colMatrix;j++){
                    x = matrixData[i][j];
          if(i<rowMatrix && j<colMatrix){
               return true;
          else{
               return false;
     public Matrix transposeMatrix( )
     {     /*returns a reference to an object of the class Matrix,
          that contains the transpose of this matrix. */
     Verify tata;
     Matrix trans;
     //Matrix var = matrixData[rowMatrix][colMatrix];
     for(int row=0;row<rowMatrix;row++){
          for(int col=0;col<colMatrix;col++){
          matrixData[rowMatrix][colMatrix] = matrixData[colMatrix][rowMatrix];
     trans = new Matrix(matrixData);
                     return trans;
     public Matrix multipleMatrix( Matrix m )
          /*returns a reference to an object of the class Matrix,
          that contains the product of this matrix and matrix m. */
      m = new Matrix(matrixData);
          //Matrix var = matrixData[rowMatrix][colMatrix];
          for(int row=0;row<rowMatrix;row++){
               for(int col=0;col<colMatrix;col++){
                    //trans[row][col] = getElement(row,col);
     return m;
     public int diffMatrix( Matrix m )
          /*returns the sum of the squared element-wise differences
          of this matrix and m ( reference to the formula in the description
          of assignment 5) */
     return 0;
     public String toString( )
          /* overloads the toString in Object */
          String output = " row = " + rowMatrix + " col="+colMatrix + "\n";
          for( int i=0; i<rowMatrix; i++)
               for( int j=0; j<colMatrix; j++)
                    output += " " + getElement(i,j) + " ";
               output += "\n";
          return output;
Second file
public class Verify extends Object {
     public static void main( String args[] )
          int[][] dataA = {{1,1,1},{2,0,1},{1,2,0},{4,0,0}}; // data of A
          int[][] dataB = {{1,2,2,0},{1,0,3,0},{1,0,3,4}};   // data of B
          Matrix matrixA = new Matrix(dataA);     // matrix A
          System.out.println("Matrix A:"+matrixA);
          Matrix matrixB = new Matrix(dataB);     // matrix B
          System.out.println("Matrix B:"+matrixB);
          // Calculate the left-hand matrix
          Matrix leftFormula = (matrixA.multipleMatrix(matrixB)).transposeMatrix();
          System.out.println("Left Side:"+leftFormula);
          // Calculate the right-hand matrix
          Matrix rightFormula = (matrixB.transposeMatrix()).multipleMatrix(matrixA.transposeMatrix());
          System.out.println("Right Side:"+rightFormula);
          // Calculate the difference between left-hand matrix and right-hand matrix
          // according to the formula in assignment description
          double diff = leftFormula.diffMatrix(rightFormula);
          if( diff < 1E-6 ) // 1E-6 is a threshold
               System.out.println("Formula is TRUE");
          else
               System.out.println("Formula is FALSE");
}My basic aim is to verify the formula
(A . B)' =B' . A' or {(A*B)tranpose = Btranspose * A transpose}Now My problem is that I have to run the verify class file and verify class file will call the matrix class and its methods when to do certain calculations (for example to find left formula it calls tranposematrix() and multipleMatrix();)
How will I be able to get the matrix which is to be transposed in transposeMatrix method (in Matrix class)becoz in the method call there is no input for transposematrix() and only one input for multipleMatrix(matrix m).
please peeople help me put in this.
thanking in advance

Please don't crosspost.
http://forum.java.sun.com/thread.jspa?threadID=691969
The other one is the crosspost.Okay, whatever. I'm not really concerned with which one is the original. I just view the set of threads overall as being a crosspost, and arbitrarily pick one to point others toward.
But either way
knightofdurham... pick one thread and post only in
the one.Indeed. And indicate such in the other one.

Need help using hierarchical list with class cl_salv_hierseq_table

I'm trying to learn how to use a hierarchical avl.
so I grabbed this code http://wiki.sdn.sap.com/wiki/display/Snippets/displaysimplehirarchiallistwithclass+cl_salv_hierseq_table
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TYPES: BEGIN OF ty_bkpf ,
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       bukrs LIKE bkpf-bukrs,
       gjahr LIKE bkpf-gjahr,
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       END OF ty_bkpf.
TYPES: BEGIN OF ty_bseg ,
       buzei LIKE bseg-buzei,
       shkzg LIKE bseg-shkzg,
       END OF ty_bseg.
DATA: it_bkpf TYPE STANDARD TABLE OF ty_bkpf ,
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DATA: ibinding TYPE salv_t_hierseq_binding.
DATA: xbinding TYPE salv_s_hierseq_binding.
DATA: gr_table TYPE REF TO cl_salv_hierseq_table.
SELECT-OPTIONS:
ndoc FOR bkpf-belnr,
empr FOR bkpf-bukrs,
anod FOR bkpf-gjahr.
START-OF-SELECTION.
PERFORM get_data.
PERFORM relat_tables.
PERFORM display_alv.
*&      Form get_data
FORM get_data .
SELECT belnr bukrs gjahr bldat waers
         INTO TABLE it_bkpf
         FROM bkpf
         WHERE belnr IN ndoc AND
               bukrs IN empr AND
               gjahr IN anod.
IF sy-subrc = 0.
    SELECT buzei shkzg
           FROM bseg
           INTO TABLE it_bseg
           FOR ALL ENTRIES IN it_bkpf
           WHERE belnr = it_bkpf-belnr AND
                 bukrs = it_bkpf-bukrs AND
                 gjahr = it_bkpf-gjahr.
ENDIF.
ENDFORM." get_data
*&      Form relat_tables
FORM relat_tables .
xbinding-master = 'BUKRS'.
xbinding-slave = 'BUKRS'.
APPEND xbinding TO ibinding.
ENDFORM. " relat_tables
*&      Form display_alv
FORM display_alv .
cl_salv_hierseq_table=>factory(
EXPORTING
t_binding_level1_level2 = ibinding
IMPORTING
r_hierseq = gr_table
CHANGING
t_table_level1 = it_bkpf
t_table_level2 = it_bseg
gr_table->display( ).
ENDFORM. " display_alv

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so far the input for the array is
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ok so i went ahead and followed what you said
public void reverse()
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contents [b] = temp;
a++;
b--;
}and its outputting { 0, 0, 0, 0}
im thinking this is because the main array is has 10 elements with only 4 in use so this is a partial array.
Example
the array is { 6, 25, 10, 5, 0, 0, 0, 0, 0, 0,}
after the swap
{0, 0 , 0 , 0, 0 , 0 , 5 , 10 , 25, 6}
i need it to be just
{ 5, 10, 25, 6}
so it is swapping the begining and end but only with zeroes the thing is i need to reverse the array without the zeroes

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Duplicate Post
Need help using dbms_scheduler to submit an immediate job on the database

Beginner: Need Help : Label Frame

Beginner: Need Help : Label Frame
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Hello there, Ingridvon.
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http://support.apple.com/kb/HT1420
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Re: Beginner needs help using a array of class objects, and quick

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