`public class MyStack {
private Object[] objects = new Object[10];
private int count;
public boolean empty(){
for (int i = 0; i < objects.length; i++) {
if(objects[i] != null){
return false;
}
}
return true;
}
public Object peek(){
Object o = null;
for (int i = 0; i < objects.length; i++) {
if(objects[i] != null){
o = objects[i];
}else{
break;
}
}
return o;
}
public Object pop(){
Object o = null;
int index = 0;
for (int i = 0; i < objects.length; i++) {
if(objects[i] != null ){
o = objects[i];
index = i;
}else{
break;
}
}
Object[] newObjects = new Object[objects.length];
System.arraycopy(objects,0,newObjects,0,index);
objects = newObjects;
count--;
return o;
}
public void push(Object item){
if(count==objects.length){
Object[] newObjects = new Object[count+1];
System.arraycopy(objects,0,newObjects,0,objects.length);
objects = newObjects;
}
objects[count++]=item;
}
public int search(Object o){
int index = -1;
for (int i = 0; i < objects.length; i++) {
if(objects[i] != null){
index = i;
}else{
break;
}
}
for (int i = 0; i < objects.length; i++) {
if(objects[i] != null && o == objects[i]){
return index - i + 1;
}
}
return -1;
}
@Override
public String toString() {
return "MyStack{" +
"objects=" + Arrays.toString(objects) +
", count=" + count +
'}';
}
}
`