Code Solution: June 2014

Friday, June 27, 2014

Arrange integer number in order of negative(-) Zero (0) and Possitive(+) number

public class ArrangeNum {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);

        List<Integer> numList = new ArrayList<Integer>();
        List<Integer> posList = new ArrayList<Integer>();
        List<Integer> negList = new ArrayList<Integer>();
        Integer middleEle = -1;
        int n;
        System.out.println("Enter Size of an array: ");
        n = input.nextInt();

        System.out.println("Enter arra elements :");
        for (int i = 0; i < n; i++ ) {

            numList.add(input.nextInt());

        }

        for (int i = 0; i < n; i++) {

            if (numList.get(i) == 0)
                middleEle = 0;
            else if ((numList.get(i)) > 0)
                posList.add(numList.get(i));
            else
                negList.add(numList.get(i));
        }

        numList.clear();
        numList.addAll(negList);
        if (middleEle == 0)
        numList.add(middleEle);
        numList.addAll(posList);

        System.out.println("New Number List -\n" + numList);


    }

}

Monday, June 23, 2014

Java Code To Perform Read/Write operation

import java.util.Scanner;

public class ReadWrite {

public static void main(String[] args) {

int num = 1;
String val = "aa";

Scanner input = new Scanner (System.in);

while ( num != 0) {

System.out.println ("Enter Number: ");
num = input.nextInt();
System.out.println ("You Entered: " + num);

}
while (! val.equalsIgnoreCase("e")) {

System.out.println ("Enter String Value: ");
val = input.next();
System.out.println ("You Entered: " + val);

}
}
}

Java Code to get Read System Registry value and Write it in HTML file

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

public class RegReader {

public static final HashMap<String, String> readRegistry(String location, List<String> keyList){

HashMap<String, String> regKeyValue = new HashMap<String, String>();

for (String key : keyList) {

try {

// Run reg query, then read output with StreamReader (internal class)
Process process = Runtime.getRuntime().exec("reg query " + '"'+ location + "\" /v " + key);

StreamReader reader = new StreamReader(process.getInputStream());
reader.start();
process.waitFor();
reader.join();

// Parse out the value
String[] parsed = reader.getResult().split("\\s+");
if (parsed.length > 1) {
regKeyValue.put(key, parsed[parsed.length-1]);
}
else
regKeyValue.put(key, null);

} catch (Exception e) {}
}

return regKeyValue;
}

static class StreamReader extends Thread {
private InputStream is;
private StringWriter sw= new StringWriter();

public StreamReader(InputStream is) {
this.is = is;
}

public void run() {
try {
int c;
while ((c = is.read()) != -1)
sw.write(c);
} catch (IOException e) {
}
}

public String getResult() {
return sw.toString();
}
}

public static void createHTML(HashMap<String,String> datas) {

try {
String basePath = new File(".").getCanonicalPath();
File f = new File(basePath + "/src" + "/Registry.html");

BufferedWriter writer = new BufferedWriter(new FileWriter(f));
writer.write("<html>");
writer.write("<body>");

for (String key : datas.keySet()) {

writer.write("<span>" + key + " : " + datas.get(key) + "</span></br>");
}

writer.write("</body>");
writer.write("</html>");
writer.close();
} catch (Exception e) {
// TODO: handle exception
}
}

public static void main(String[] args) {

String location = "HKEY_LOCAL_MACHINE\\HARDWARE\\DESCRIPTION\\System\\BIOS";
List<String> keyList = new ArrayList<String>();
//Add List of Keys for getting its value
keyList.add("SystemSKU");
//keyList.add("VersionExt");

HashMap<String, String> value = RegReader.readRegistry(location, keyList);

createHTML(value);

for (String key : value.keySet()) {

System.out.println(key + " : " + value.get(key));
}
}
}