hey guys I need help to implement a array list I have the skeleton structure written out but some of the methods do not work and I have troubles with the remove method please help and how do you do isEmpy method
//tried my best dont get some stuff
public class ArrayList{
private Object[] array;
private int position;
ArrayList(){
this.array = new Object[15];
this.position = 0;
}
//apprently this does not work and my next add method works....strange
public void add(Object o){
array[this.position]= o;
this.position++;
}
public void add(int index, Object o){
if(index<=array.length){
Object[] tempArray = null;
tempArray = array;
array = new Object[index + array.length*2];
System.arraycopy(tempArray, 0, array, 0, tempArray.length);
}
array[index]=o;
}
public void clear(){
for(int i=0;i<array.length;i++){
array[i] = null;
}
}
public boolean contains(Object o){
for(int i = 0; i<array.length;i++)
if(this.array[i] == o) return true;
return false;
}
public Object get(int index){
return this.array[index];
}
public int indexOf(Object o){
for(int i = 0; i<array.length; i++)
if(this.array[i] == o) return i;
return 0;
}
public boolean isEmpty(){
return true;
}
public int lastIndexOf(Object o){
for(int i = array.length - 1; i>=0;i--)
if(array[i]==o) return i;
return 0;
}
//????
public boolean remove(Object o){
return true;
}
public int size(){
return array.length;
}
//???
public boolean remove(int index){
return true;
}
public Object set(int index, Object o){
o = array[index];
array[index] = o;
return o;
}
}please help me on fixing my code thank you so much people