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Q) I have a ArrayList object, in that object i have added 5
integer values, 5 float values, 5 string values. Now
question is how can delete particular type of data ( i.e all
int values or all float values or string values) in that
list object at a time?
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Answer / srivatsava
import java.util.*;
public class ArrayListDeleteParticularDataTypeExample {
/**
* @param args
*/
public static void main(String[] args) {
ArrayListDeleteParticularDataTypeExample obj = new ArrayListDeleteParticularDataTypeExample();
ArrayList al = new ArrayList();
al.add(new Integer(1));
al.add(new Integer(2));
al.add(new Integer(3));
al.add("A");
al.add("B");
al.add("C");
al.add(new Float(10.10));
al.add(new Float(20.20));
al.add(new Float(30.30));
System.out.println("ArrayList Size Before - "+al.size());
System.out.println("ArrayList Values Before- "+al);
Iterator it = al.iterator();
while(it.hasNext()){
if(it.next() instanceof String){
it.remove();
}
}
System.out.println("ArrayList Size After - "+al.size());
System.out.println("ArrayList Values After - "+al);
}
}
| Is This Answer Correct ? | 8 Yes | 0 No |
Answer / anjan singh
ArrayList al=new ArrayList();
al.add("a");al.add("b");al.add(1);al.add
(2);al.add(1.1);al.add(2.1);
System.out.println("Before:\n");
System.out.println(al);
for(int i=0;i<al.size();)
{
if(al.get(i) instanceof String)
al.remove(i);
else
i++;
}
System.out.println("After:\n");
System.out.println(al);
| Is This Answer Correct ? | 0 Yes | 0 No |
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