Реализовать методПри поиске через ArrayList
public void search (String searchString) { }
, чтобы итерацию по ArrayList ноты до тех пор, пока не найдет записку, содержащую SearchString. Затем он должен напечатать либо найденный элемент, либо сообщение «String not found».
До сих пор у меня есть:
import java.util.ArrayList;
import java.util.Iterator;
/**
* A class to maintain an arbitrarily long list of notes.
* Notes are numbered for external reference by a human user.
* In this version, note numbers start at 0.
*
* @author David J. Barnes and Michael Kolling.
* @version 2008.03.30
*/
public class Notebook
{
// Storage for an arbitrary number of notes.
private ArrayList<String> notes;
/**
* Perform any initialization that is required for the
* notebook.
*/
public Notebook()
{
notes = new ArrayList<String>();
}
/**
* Store a new note into the notebook.
* @param note The note to be stored.
*/
public void storeNote(String note)
{
notes.add(note);
}
/**
* @return The number of notes currently in the notebook.
*/
public int numberOfNotes()
{
return notes.size();
}
/**
* Show a note.
* @param noteNumber The number of the note to be shown.
*/
public void showNote(int noteNumber)
{
if(noteNumber < 0) {
// This is not a valid note number, so do nothing.
System.out.println("invalid index given");
}
else if(noteNumber < numberOfNotes()) {
// This is a valid note number, so we can print it.
System.out.println(notes.get(noteNumber));
}
else {
System.out.println("there are fewer items in the notebook");
// This is not a valid note number, so do nothing.
}
}
public void removeNote(int noteNumber)
{
if(noteNumber < 0) {
// This is not a valid note number, so do nothing.
System.out.println("invalid index given");
}
else if(noteNumber < numberOfNotes()) {
// This is a valid note number.
notes.remove(noteNumber);
}
else {
System.out.println("there are fewer items in the notebook");
// This is not a valid note number, so do nothing.
}
}
/* Edit note.
* I tried to improve the formatting of the code below, but I'm completely
* unable to figure out how on earth anything of that should make sense
* and therefore the indentation is completely without any meaning.
*/
public void search (String searchString)
{
for each notes in ArrayList {
if notes = searchString;
System.out.println("String found"); + searchString
return end
}
if}
System.out.println("String not found");
}
}
Но это не работает, и я не в состоянии работать его.
ли "если ноты ArrayList (SearchString <= 0)" даже компилировать? – jball
он, похоже, не компилируется. – user215049
На каком языке вы используете? –