Passing a whole array through a method

Question

I need some quick help on how to pass a whole array through the method addCoins(). Here is the code:
public class Purse {
     private Coin[] coins;
     private int lastIdx;
public Purse() {
     coins = new Coin[100];
     lastIdx = 0;
public boolean addCoin(Coin b) {
     if (lastIdx < coins.length) {
          lastIdx++;
          coins[lastIdx] = b;
          return true;
     else {
          return false;
public boolean addCoins(Coin[] b) {
     if (lastIdx < coins.length) {
          for (b=0; b<99; b++) {
               coins[b] = b;
     else {
          return false;
}I figured passing the whole array would be "Coin[] b" but apparently Eclipse says that it can't convert from int to Coin[]. I have no idea what that means. Thanks in advance.

Answer 1

I need to create 3 classes, Coin, Purse, and TestPurse.
Coin code:
public class Coin {
     private String typeOfCoin;
     private double value;
public Coin(String t, double v) {
     typeOfCoin = t;
     value = v;
public String toString() {
     return typeOfCoin + value;
}Purse code:
public class Purse {
     private Coin[] coins;
     private int lastIdx;
public Purse() {
     coins = new Coin[100];
     lastIdx = 0;
public boolean addCoin(Coin b) {
     if (lastIdx < coins.length) {
          lastIdx++;
          coins[lastIdx] = b;
          return true;
     else {
          return false;
public boolean addCoins(Coin[] b) {
      if (lastIdx < coins.length) {
          for (int i=0; i<coins.length; i++) {
               coins[i] = b;
     else {
          return false;
public Coin getReverse() {
     coins = new Coin[0];
     lastIdx = 100;
}In the Purse class, I need methods addCoin and addCoins that need to return boolean.  addCoin is supposed to add the argument coin as an element of the coins array if there is space.  addCoins neds to add all the coins in the input argument as elements of the coins array if there is space.  I then have to create two methods, getReverse and getValue that take no argument and getReverse that returns an array of type Coin while getValue returns a double.  In getReverse, I create an array simlar to coins but this new array is reverse.  I started on this method but I first need to worry about the addCoin and addCoins method.  For the record, getValue needs to add up the values of all the coins in the purse and return it, which I have no idea how to do that.  That's my next question.
Edited by: quagmire87 on Dec 1, 2009 4:35 PM
fixed method addCoins