Iterable
interface.
A category that implements the Iterable can be utilized with the brand new for-loop. Right here is such an instance:
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Listing record = new ArrayList();
for(Object o : record){
//do one thing o;
}
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The Iterable interface has just one technique:
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public interface Iterable<T> {
public Iterator<T> iterator();
}
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Now create a java class so as to add into that ArrayList
…
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bundle org.techzoo.util;
import static java.lang.String.format;
public class Pencil {
personal String identify,make;
personal int value;
public Pencil(){}
public Pencil(String identify,String make,int value){
this.identify = identify;
this.make = make;
this.value = value;
}
public String getName() {return identify;}
public String getMake() {return make;}
public int getPrice() {return value;}
public void setName(String identify) {this.identify = identify;}
public void setMake(String make) {this.make = make;}
public void setPrice(int value) {this.value = value;}
@Override
public String toString(){
return format(“Title:tpercentstMake:tpercentstPrice:tpercentd”,
identify,make,value);
}
}
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Now, create a category PencilArrayList
which implements Iterable
interface.
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bundle org.techzoo.util;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Listing;
public class PencilArrayList implements Iterable<Pencil> {
personal Listing<Pencil> pencils;
personal static ultimate int MIN_SIZE = 10;
public PencilArrayList(){
pencils = new ArrayList<Pencil>(MIN_SIZE);
}
public PencilArrayList(int dimension){
pencils = new ArrayList<Pencil>(dimension);
}
public void addPencil(Pencil p){
pencils.add(p);
}
public void removePencil(Pencil p){
pencils.take away(p);
}
public int dimension(){
return pencils.dimension();
}
@Override
public Iterator<Pencil> iterator() {
return pencils.iterator();
}
public static void essential(String[] args) {
Pencil p1 = new Pencil(“SuperB”,“Natraj”,3);
Pencil p2 = new Pencil(“Hero”,“Swami”,4);
PencilArrayList pList = new PencilArrayList();
pList.addPencil(p1);
pList.addPencil(p2);
for (Pencil pencil : pList) {
System.out.println(pencil);
}
}
}
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