Loop, iterate with unexpected results, Propertie - loops

Question

package javaapplication43;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Properties;
import java.io.FileInputStream;
public class JavaApplication43 {
int totalResults = 45; //
int itemsperPage = 10;
int i = 0;
int j = 0;
int count = 0;
FileOutputStream output = null;
Properties prop = new Properties();
FileInputStream input=null;
public JavaApplication43() throws FileNotFoundException, IOException {
output = new FileOutputStream("config.properties");
// set the properties value
prop.setProperty("totalResults", "45");
prop.setProperty("itemsperPage", "10");
prop.setProperty("?", "?");
// save properties to project root folder
prop.store(output, null);
input = new FileInputStream("config.properties");
// load a properties file
prop.load(input);
// get the property value and print it out
System.out.println(prop.getProperty("totalResults"));
System.out.println(prop.getProperty("itemsperPage"));
System.out.println(prop.getProperty("?"));
}
public void makeLoop() {
for (i = 1; i <= (totalResults / itemsperPage) + 1; i++) {
System.out.println("nextPage " + i);
for (; j < i * itemsperPage; j++) {
if (j > totalResults) {
break;
}
System.out.println("Filenumber " + (j + 1));
}
}
}
public static void main(String[] args) throws IOException {
JavaApplication43 myTest = new JavaApplication43();
myTest.makeLoop();
}
}
*This Code gives the Result:
nextPage1: Filnumber1, Filnumber2...Filenumber10
nextPage2: Filenumber11, Filenumber12.., Filenumber20
nextPage5: Filenumber41, Filenumber42.., Filenumber46
And so on. I expect the result so, if i start the next time with a sheduller it should start
with the nextpage2 and print the files from 11-20,
if i start again the programm it should start with the nextpage 3 and print the files from 21-30 and so on depends on the value wich i have for totalResults.
The Solution is may to save the value in the Property to make it Persistent, so that
if i run the Programm again, it will read the Property config.properties to start on the right index, but i dont know how to iterate, through the loop. ?

Answer 1

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Properties;
import java.io.FileInputStream;
public class JavaApplication43_with_Main_3 {
public static void main(String[] args) throws IOException {
int totalResults = 45; //
int itemsperPage = 10;
int i = 0;
int j = 0;
FileOutputStream output = null;
Properties prop = new Properties();
FileInputStream input = null;
input = new FileInputStream("config.properties");
// load a properties file
prop.load(input);
// get the property value and print it out
System.out.println("nextPage Prop " + prop.getProperty("nextPage"));
String nextPage = prop.getProperty("nextPage");
int intNextPage = Integer.parseInt(nextPage);
System.out.println("intNextPage " + intNextPage);
for (i = intNextPage; i <= (totalResults / itemsperPage) + 1; i++) {
int jNextPage=intNextPage-1;
System.out.println("nextPage here " + i);
for (j=jNextPage*itemsperPage; j < i * itemsperPage; j++) {
// System.out.println("j ist "+j);
if (j > totalResults) {
break;
}
System.out.println("Filenumber " + (j + 1));
}
String strI = "" + (i + 1);
System.out.println("hello " + strI);
output = new FileOutputStream("config.properties");
prop.setProperty("nextPage", strI);
prop.store(output, null);
break;
}
}
}
This is the does make loop and printing out
nextPage 1, Filenumber1,Filenumber2,..,Filenumber10
then it saves the nextPage value into the Property File.
If you start again, it does printing out
nextPage 2, Filenumber11,Filenumber12,...,Filenumber20
You should have e Propertiy File with the Name, config.properties
and but the key nextPage and the value 1, nextPage=1;--->config.properties