我正在寻求自助方面的帮助，这有点矛盾。我如何通过解决更多我自己的问题来少打扰你们这些好人？
我在 Java 编程的最后一周，我在学习 Java 方面遇到了巨大的障碍。我已经阅读了所有的书，但我一直被一些小问题挂断。这就像试图建立一个纸牌屋。我只知道本书展示的部分语法和用途。当我组合事物时，我遇到了可怕的障碍。我尝试了几个小时的修补来弄清楚它们。sun 文档仅显示似乎无济于事的基本用途
这是我想要的：
当我尝试某些事情并且它不像数组列表的以下操作那样工作时，我想找到一个可以显示示例代码的地方或程序，例如向arrayList 添加一个额外的类实例。我在哪里可以简洁地了解这一点，而不必为每个语法错误问一个或 2 个问题？Google for Java 在哪里？是否有一个程序可以处理您的错误并向您展示如何修复它们（或提供建议）？
/tmp/jc_4083/Inventory.java:101: incompatible types
found : RatedDVD[]
required: java.util.ArrayList
dvdlist = temp;
^
/tmp/jc_4083/Inventory.java:110: array required, but java.util.ArrayList found
if (p != dvdlist[i]) {
^
/tmp/jc_4083/Inventory.java:111: array required, but java.util.ArrayList found
temp[i-adj] = dvdlist[i];
^
/tmp/jc_4083/Inventory.java:115: incompatible types
found : RatedDVD[]
required: java.util.ArrayList
dvdlist = temp;
如果有人有兴趣帮我看，这是我的课程代码：
//Contruct inv and allow for methods add, get, size, sort, and value
import java.util.*;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
public class Inventory
{// class Inventory
private ArrayList<RatedDVD> dvdlist;// declare dvdlist as ArrayList of RatedDVD
private int numDVDs;
public Inventory()
{// method Inventory
dvdlist = new ArrayList<RatedDVD>();
}// end method
// add & get
public RatedDVD get(int i){return dvdlist.get(i);}// method get
public void add(DVD d){
dvdlist = dvdlist d;
sort();
}// method add
public double value()
{// method value
double total = 0.0;
for (int i = 0; i < dvdlist.size(); i++)
{// for every pass thru dvdlist add total
// [DEBUG] consider enhanced for
total += get(i).feeValue();
}
return total;
}// end method value
public void sort()
{// method sort
// [DEBUG] consider optimization
int n = dvdlist.size();
for (int search = 1; search < n; search++)
{// for do the following and increment till dvdlist has been searched
for (int i = 0; i < n-search; i++)
{// for step through comparison for entire dvdlist
if (dvdlist.get(i).getName().compareToIgnoreCase(dvdlist.get(i+1).getName()) > 0)
{// if swap necessary then swap
RatedDVD temp = dvdlist.get(i);
dvdlist.set(i,dvdlist.get(i+1));
dvdlist.set(i+1,temp);
}// end if swap
}// end for compareto
}// end outer for
}// end method sort
public int size(){return dvdlist.size();}// method size
public void save() {
save(true);
}
// save it to C:\data\inventory.dat
public void save(boolean saveagain) {
try {
BufferedWriter w = new BufferedWriter(new FileWriter("c:\\data\\inventory.dat"));
for (int i = 0; i < size(); i++) {
RatedDVD dvd = get(i);
w.write( dvd.getItem() + "\n");
w.write( dvd.getName() + "\n");
w.write( dvd.getRating() + "\n");
w.write( dvd.getUnits() + "\n");
w.write( dvd.getPrice() + "\n");
w.write( dvd.value() + "\n");
w.write( dvd.fee() + "\n");
w.write( dvd.feeValue() + "\n");
w.newLine();
}
// total value of it
//w.write( value() + "\n");
w.close();
} catch (Exception ex) {
if (saveagain) {
new File("c:\\data\\").mkdir(); // make file if doesn't exist
save(false);
}
}
}
public int search(String name) {
for (int i = 0; i < size(); i++) { // check if name string is equal
if (get(i).getName().equalsIgnoreCase(name)) return i;
}
return -1; // we didn't find anything
}
// add a new dvd to the end, increasing the array size
public void add(RatedDVD p) {
RatedDVD[] temp = new RatedDVD[dvdlist.size()+1];
for (int i = 0; i < dvdlist.size(); i++) {
temp[i] = dvdlist[i];
}
temp[temp.length-1] = p; // add it at the end
dvdlist = temp;
}
// remove a DVD from the array, and shrink the array size
public void delete(RatedDVD p) {
RatedDVD[] temp = new RatedDVD[dvdlist.size()-1];
int adj = 0;
for (int i = 0; i < dvdlist.size(); i++) {
if (p != dvdlist[i]) {
temp[i-adj] = dvdlist[i];
}
else adj = 1;
}
dvdlist = temp;
}
public int highestNumber() {
int numb = 0;
for (int i = 0; i < dvdlist.size(); i++) {
if (get(i).getItem() > numb) {
numb = get(i).getItem();
}
}
return numb;
}
}// end class inventory