![1.Program for copy one arraylist into another
arraylist.
package com.arraylist;
import java.util.ArrayList;
import java.util.Iterator;
public class ArrayListDemo1 {
public static void main(String[] args) {
ArrayList<Integer> al = new
ArrayList<Integer>();
al.add(10); // 0th index
al.add(20); // 1st index
al.add(30); // 2nd index
ArrayList<Integer> al2 = new
ArrayList<Integer>();
al2.add(40); // 0th index
al2.add(50); // 1st index
al2.add(60); // 2nd index
al.addAll(al2);
System.out.println("copy arraylist is=" + al);
Iterator<Integer> itr = al.iterator();
while (itr.hasNext()) {
System.out.println(itr.next());](https://image.slidesharecdn.com/javacollection2-250312170535-0ace90ec/85/Its-Concept-of-Collection-_JAVA_Collection2-docx-1-320.jpg)
![}
}
}
//2. Program for design generic arraylist for Integer
type only
package com.arraylist;
import java.util.ArrayList;
public class ArrayListDemo2 {
public static void main(String[] args) {
ArrayList<Integer> al= new
ArrayList<Integer>();
al.add(10);
al.add(20);
al.add(30);
for(int i: al) {
System.out.println(""+i);
}
}
}
3.Program for design the generic arraylist for String
type only
package com.arraylist;](https://image.slidesharecdn.com/javacollection2-250312170535-0ace90ec/85/Its-Concept-of-Collection-_JAVA_Collection2-docx-2-320.jpg)
![import java.util.ArrayList;
public class ArrayListDemo3 {
public static void main(String[] args) {
ArrayList<String> al= new ArrayList<String>();
al.add("10");
al.add("20");
al.add("30");
for(String str: al) {
System.out.println(""+str);
}
}
}
4) ArrayList : iteration technique
public class ArrayListDemo4 {
public static void main(String[] args) {
ArrayList<Integer> al = new
ArrayList<>();
al.add(10);
al.add(20);
al.add(30);
System.out.println("Direct>>");
System.out.println(al);
System.out.println("Traditional for
loop>>");
for(int i=0 ; i<al.size(); i++) {
System.out.println(al.get(i));
}](https://image.slidesharecdn.com/javacollection2-250312170535-0ace90ec/85/Its-Concept-of-Collection-_JAVA_Collection2-docx-3-320.jpg)
Its Concept of Collection _JAVA_Collection2.docx
- 1. 1.Program for copy one arraylist into another arraylist. package com.arraylist; import java.util.ArrayList; import java.util.Iterator; public class ArrayListDemo1 { public static void main(String[] args) { ArrayList<Integer> al = new ArrayList<Integer>(); al.add(10); // 0th index al.add(20); // 1st index al.add(30); // 2nd index ArrayList<Integer> al2 = new ArrayList<Integer>(); al2.add(40); // 0th index al2.add(50); // 1st index al2.add(60); // 2nd index al.addAll(al2); System.out.println("copy arraylist is=" + al); Iterator<Integer> itr = al.iterator(); while (itr.hasNext()) { System.out.println(itr.next());
- 2. } } } //2. Program for design generic arraylist for Integer type only package com.arraylist; import java.util.ArrayList; public class ArrayListDemo2 { public static void main(String[] args) { ArrayList<Integer> al= new ArrayList<Integer>(); al.add(10); al.add(20); al.add(30); for(int i: al) { System.out.println(""+i); } } } 3.Program for design the generic arraylist for String type only package com.arraylist;
- 3. import java.util.ArrayList; public class ArrayListDemo3 { public static void main(String[] args) { ArrayList<String> al= new ArrayList<String>(); al.add("10"); al.add("20"); al.add("30"); for(String str: al) { System.out.println(""+str); } } } 4) ArrayList : iteration technique public class ArrayListDemo4 { public static void main(String[] args) { ArrayList<Integer> al = new ArrayList<>(); al.add(10); al.add(20); al.add(30); System.out.println("Direct>>"); System.out.println(al); System.out.println("Traditional for loop>>"); for(int i=0 ; i<al.size(); i++) { System.out.println(al.get(i)); }
- 4. System.out.println("For each loop>>"); for(int i : al) { System.out.println(i); } System.out.println("Using iterator>>"); Iterator< Integer> itr =al.iterator(); while(itr.hasNext()) { System.out.println(itr.next()); } System.out.println("using listiterator>>"); ListIterator<Integer> litr=al.listIterator(al.size()); while(litr.hasPrevious()) { System.out.println(litr.previous()); } } }