能帮我解决下这个bug吗
IDE 提示: error: class PriorityQApp is public, should be declared in a file named PriorityQApp.java public class PriorityQApp {
可是我已经写了 public 了啊
////////////////////////////////////////////////////////////////
class Link {
public long dData; // data item
public Link next; // next link in list
// -------------------------
public Link(long dd) // constructor
{
dData = dd;
}
// -------------------------
public void displayLink() // display this link
{
System.out.print(dData + " ");
}
} // end class Link
// //////////////////////////////////////////////////////////////
class SortedList {
private Link first; // ref to first item
// -------------------------
public SortedList() // constructor
{
first = null;
}
// -------------------------
public boolean isEmpty() // true if no links
{
return (first == null);
}
// -------------------------
public void insert(long key) // insert, in order
{
Link newLink = new Link(key); // make new link
Link previous = null; // start at first
Link current = first;
// until end of list,
while (current != null && key > current.dData) { // or key > current,
previous = current;
current = current.next; // go to next item
}
if (previous == null) // at beginning of list
first = newLink; // first --> newLink
else
// not at beginning
previous.next = newLink; // old prev --> newLink
newLink.next = current; // newLink --> old currnt
} // end insert()
// -------------------------
public Link remove() // return & delete first link
{ // (assumes non-empty list)
Link temp = first; // save first
first = first.next; // delete first
return temp; // return value
}
// -------------------------
public void displayList() {
System.out.print("List (first-->last): ");
Link current = first; // start at beginning of list
while (current != null) // until end of list,
{
current.displayLink(); // print data
current = current.next; // move to next link
}
System.out.println("");
}
} // end class SortedList
// //////////////////////////////////////////////////////////////
// =================================================================
// 编程作业 5.1
class PriorityQ {
private SortedList sortedList;
public PriorityQ() {
sortedList = new SortedList();
}
public void insert(long item) {
sortedList.insert(item);
}
public long remove() {
return sortedList.remove().dData;
}
public boolean isEmpty() {
return sortedList.isEmpty();
}
public void display() {
sortedList.displayList();
}
}
// =================================================================
public class PriorityQApp {
public static void main(String[] args) {
PriorityQ thePQ = new PriorityQ();
thePQ.insert(30);
thePQ.insert(50);
thePQ.insert(10);
thePQ.insert(40);
thePQ.insert(20);
thePQ.display();
while (!thePQ.isEmpty()) {
long item = thePQ.remove();
System.out.print(item + " "); // 10, 20, 30, 40, 50
} // end while
System.out.println("");
} // end main()
}
// =================================================================
[解决办法]
你的java文件名要写成:PriorityQApp.java
