Java SE 7 Update 1 released

Java SE 7u1 released with download link here: http://www.oracle.com/technetwork/java/javase/downloads/index-jsp-138363.html

Details of the release notes, please refer: http://www.oracle.com/technetwork/java/javase/jdk7-relnotes-429209.html

Sort array of object using custom Comparator

Example:

import java.util.Arrays;
import java.util.Comparator;

public class SortComparator {
 
 final static int NUMBER_OF_OBJ = 5;
 
 public class MyClass {
  String name;
  int number;
  MyClass(String n, int i){
   name = n;
   number = i;
  }
 }

 public static void main(String[] args){
  System.out.println("Sort Comparator");
  
  SortComparator sortComparator = new SortComparator();
  
  MyClass[] myClassArray = new MyClass[NUMBER_OF_OBJ];

  myClassArray[0] = sortComparator.new MyClass("ABC", 9);
  myClassArray[1] = sortComparator.new MyClass("Eric", 6);
  myClassArray[2] = sortComparator.new MyClass("Java", 7);
  myClassArray[3] = sortComparator.new MyClass("Android", 199);
  myClassArray[4] = sortComparator.new MyClass("test", -3);
  showMyClass(myClassArray);
  
  Arrays.sort(myClassArray, comparatorName);
  System.out.println("\nmyClassArray sorted by name");
  showMyClass(myClassArray);
  
  Arrays.sort(myClassArray, comparatorNumber);
  System.out.println("\nmyClassArray sorted by number");
  showMyClass(myClassArray);
  
 }
 
 static Comparator<? super MyClass> comparatorName 
 = new Comparator<MyClass>(){
  public int compare(MyClass obj1, MyClass obj2) {
   return String.valueOf(obj1.name).compareTo(obj2.name); 
  }  
 };
 
 static Comparator<? super MyClass> comparatorNumber 
 = new Comparator<MyClass>(){
  public int compare(MyClass obj1, MyClass obj2) {
   return Integer.valueOf(obj1.number).compareTo(obj2.number); 
  }  
 };
 
 static void showMyClass(MyClass[] mc){
  for(int i = 0; i < mc.length; i++){
   System.out.println(mc[i].name 
     + " : " 
     + mc[i].number);
  }
 }
}

Sort Array

java.util.Arrays can be used to sort a array.

Example:

import java.lang.String;
import java.util.Arrays;

public class exSortArray{
 
 public static void main(String[] args){
  
  String src[] ={
   "MNO",
   "A",
   "DEF", 
   "GHI", 
   "JKL", 
   "PQR", 
   "BC",
   "STU",
   "YZ",
   "VWX"};
  
  System.out.println("Sort Array Exerecise");
  System.out.println();
   
  System.out.println("Array before Sort");
  showAll(src);
  
  System.out.println();
  
  Arrays.sort(src);
  System.out.println("Array after Sort");
  showAll(src);
  
 }
 
 static void showAll(String[] a){
  for(int i = 0; i < a.length; i++){
   System.out.println(i + ": " + a[i]);
  }
 }
 
 
}

Related Article:
- Sort array of object using custom Comparator