Submitted by secondeye on Fri, 07/30/2010 - 10:02.
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Step 1: Define the Comparator that compares integer values.
import java.util.Comparator;
public class MyIntComparable implements Comparator<Integer>{
@Override
public int compare(Integer o1, Integer o2) {
return (o1>o2 ? -1 : (o1==o2 ? 0 : 1));
}
}
Step 2: Call the Comparator in Collections.Sort.
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
public class Simple2 {
public static void main(String[] args) {
List<Integer> list = new ArrayList<Integer>();
list.add(5);
list.add(4);
list.add(3);
You can convert a String to integer using parseInt() method of Integer wrapper class or using valueOf() and intValue() methods together as follows.
str = "25";
int i = Integer.valueOf(str).intValue();
or
int i = Integer.parseInt(str);
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
public class MainClass {
public static void main(String args[]) throws Exception {
List list = Arrays.asList("a","c","b");
Collections.sort(list);
for (int i = 0, n = list.size(); i < n; i++) {
if (i != 0)
System.out.print(", ");
System.out.print(list.get(i));
}
System.out.println();
}
}
public class ConvertStringToDouble {
public static void main(String[] args) {
String aString = "78";
double aDouble = Double.parseDouble(aString);
System.out.println(aDouble);
}
}
4 answers
I'm trying to sort a HashMap by values. I know that it might not be "good style", but it would save a lot of work, as I wouldn't have to rewrite lots of code if I could just get the HashMap sorted by value.
After lots of searching and trial and error cases I'm still stuck.
The HashMap itself is still unsorted.
import java.util.* ;
public class H
{
static HashMap first = new HashMap();
static
{
first.put("20030120" , new Integer (56));
first.put("20030118" , new Integer (19));
first.put("20030125" , new Integer (25));
Created by Anonymous
1 week 6 days ago
Tags:
Submitted by ankit on Mon, 06/14/2010 - 17:51.
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Ebizon Redfire is an elegant single column theme for Drupal 6. . In this article I will show how we can customize nad make it a three column theme
Its very simple and for that we will need to make changes to our page.tpl.php and style.css.
Changing Page.tpl.php
Look for following text in the page.tpl file
<?php print $content;?>
This is the main content are. We will paste our left block above this region. Use the following code
<?php print $left;?>
Submitted by Anonymous on Tue, 06/08/2010 - 18:32.
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2 answers
'm have installed java sdk 1.5 on a linux CentOS server. If I run java, I get this error:
Error occurred during initialization of VM
Could not reserve enough space for object heap
Could not create the Java virtual machine.
How do I solve it?
Read more »
Created by Anonymous
7 weeks 3 days ago
Tags:
Following are the steps on how to install java sdk on CentOS:
Remove any java package (free and open source implementation) previously (eventually) installed from the CentOS Linux as follows:
yum erase jre
Remove tomcat5 and all it’s related packages.
Find the related *).bin file (jdk-6u20-linux-i586-rpm.bin) from the main page of the Sun’s official download page.
After you have downloaded your bin file. Run it on linux shell as follows:
chmod +x jdk-6u20-linux-i586-rpm.bin
