我遇到了似乎没有停止的for循环问题。当我第一次在自定义列表中仅使用一个项目调用outPutGenerator时,它运行良好。当我用9个项目再次运行它时,它一直在运行。您能指出我正确的方向吗?
编辑:我可以让测试第二次运行,但是此后什么都没有。
input:
1
5
3
3 2 4
1 5 2
3 6 4
1
6
2
5 6
6 7
代码:
public static void outputGenerator (CustomList [] list, PrintWriter printWriter) {
int size2;
int valueToPrint;
CustomList listToBuild;
int length;
length = list.length;
System.out.println("len: " + length);
//print out the results to a .txt file
try {
printWriter.println("Matrix read: ");
printWriter.println();
printWriter.println("------------------" +
"---------------------");
printWriter.println();
printWriter.flush();
for (int x = 0; x < length; x++){
System.out.println("test");
listToBuild = list[x];
size2 = listToBuild.sizeOfList();
System.out.println("size2 " + size2);
for (int y = 0; y < size2; y++) {
System.out.println("y: " + y);
valueToPrint = listToBuild.ValueOfNode(y);
printWriter.println(valueToPrint);
System.out.println("val" + valueToPrint);
printWriter.flush();
}
printWriter.println();
}
return;
}catch (Exception e) {
e.printStackTrace();
}
}
自定义链接列表代码:
public class CustomList {
private Node firstNode;
private Node end;
private Node header;
private int sizeOfMatrix;
private int sizeOfList;
//constructor to set all to blank
public CustomList() {
firstNode = null;
end = null;
header = null;
sizeOfMatrix = 0;
sizeOfList = 0;
}
public void addToList(int dataToSave) {
Node node = new Node (dataToSave);
if (firstNode == null) {
firstNode = node;
firstNode.next = end;
firstNode.before = header;
}
else if (end == null) {
end = node;
end.before = firstNode;
firstNode.next = end;
}
else
end.next = node;
node.before = end;
end = node;
sizeOfMatrix++;
}
public void setHeader (int dataToUse){
Node headerNode = new Node(dataToUse);
header = headerNode;
header.next = firstNode;
}
public void print() {
Node zNode = firstNode;
System.out.println("Test");
if(firstNode == null){
System.out.print("EMPTY");
return;
}
while (zNode != null) {
System.out.println(zNode);
zNode = zNode.next;
}
}
public int sizeOfList() {
Node zNode = firstNode;
sizeOfList = 0;
while( zNode != null) {
zNode = firstNode.next;
sizeOfList++;
}
return sizeOfList;
}
public int ValueOfNode( int column ) {
int counter = 0;
Node zNode = firstNode;
while (zNode != null) {
if (column == counter){
return zNode.numInMatrix();
}
else
zNode = firstNode.next;
counter++;
}
return -1;
}
当你做的时候
size2 = listToBuild.sizeOfList();
sizeOfList()将始终为每个调用返回相同的值。
我想,您不会更改firstNode的值。而且,我对您的功能进行了一些更改。
public int sizeOfList() {
Node zNode = firstNode;
sizeOfList = 0;
while( zNode != null) {
zNode = zNode.next;
sizeOfList++;
}
return sizeOfList;
}
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