RowColumnPagePrinter
unknown
java
a year ago
1.7 kB
1
Indexable
Never
package literatePrimes; import java.io.PrintStream; public class RowColumnPagePrinter { private int rowsPerPage; private int columnsPerPage; private int numbersPerPage; private String pageHeader; private PrintStream printStream; public RowColumnPagePrinter(int rowsPerPage, int columnsPerPage, String pageHeader) { this.rowsPerPage = rowsPerPage; this.columnsPerPage = columnsPerPage; this.pageHeader = pageHeader; numbersPerPage = rowsPerPage * columnsPerPage; printStream = System.out; } public void print(int data[]) { int pageNumber = 1; for (int firstIndexOnPage = 0; firstIndexOnPage < data.length; firstIndexOnPage += numbersPerPage) { int lastIndexOnPage = Math.min(firstIndexOnPage + numbersPerPage - 1, data.length - 1); printPageHeader(pageHeader, pageNumber); printPage(firstIndexOnPage, lastIndexOnPage, data); printStream.println("\f"); pageNumber++; } } private void printPage(int firstIndexOnPage, int lastIndexOnPage, int[] data) { int firstIndexOfLastRowOnPage = firstIndexOnPage + rowsPerPage - 1; for (int firstIndexInRow = firstIndexOnPage; firstIndexInRow <= firstIndexOfLastRowOnPage; firstIndexInRow++) { printRow(firstIndexInRow, lastIndexOnPage, data); printStream.println(""); } } private void printRow(int firstIndexInRow, int lastIndexOnPage, int[] data) { for (int column = 0; column < columnsPerPage; column++) { int index = firstIndexInRow + column * rowsPerPage; if (index <= lastIndexOnPage) printStream.format("%10d", data[index]); } } private void printPageHeader(String pageHeader, int pageNumber) { printStream.println(pageHeader + " --- Page " + pageNumber); printStream.println(""); } public void setOutput(PrintStream printStream) { this.printStream = printStream; } }