在Java中,将数据输出到另一个类中的字符串
我目前无法从列表中提取某些值。我想将在Java中,将数据输出到另一个类中的字符串,java,arrays,list,Java,Arrays,List,我目前无法从列表中提取某些值。我想将数据打印到另一个名为卡的类中的字符串中,我不确定如何执行此操作: private List<FootballPlayer> getData() { List<FootballPlayer> theData = new ArrayList<FootballPlayer>(); // create a Scanner and grab the data . . . Scanner scanner = nu
数据
打印到另一个名为卡
的类中的字符串中,我不确定如何执行此操作:
private List<FootballPlayer> getData() {
List<FootballPlayer> theData = new ArrayList<FootballPlayer>();
// create a Scanner and grab the data . . .
Scanner scanner = null;
String dataPath = dbLocation + File.separator + "text" + File.separator + "players.db";
String imagePath = dbLocation + File.separator + "images";
try {
scanner = new Scanner(new File(dataPath));
} catch (FileNotFoundException fnf) {
System.out.println(fnf.getMessage());
System.exit(0);
}
// scan player.db file line-by-line
scanner.useDelimiter("\n");
while (scanner.hasNext()) {
String line = scanner.next().trim();
// trim used to trim for new line
String[] bits = line.split(":");
String t = bits[0]; // title
String imgFileName = bits[1]; // image file name
int pa = Integer.parseInt(bits[2]); // pace
int sh = Integer.parseInt(bits[3]); // shooting
int dr = Integer.parseInt(bits[4]); // dribbling
int ph = Integer.parseInt(bits[5]); // physical
// create the image
ImageIcon img = new ImageIcon(imagePath + File.separator + imgFileName);
// Create the business object
FootballPlayer player = new FootballPlayer(t, img, pa, sh, dr, ph);
// add it to the list ... simple as ...
theData.add(player);
}
scanner.close();
return theData;
假设
FootballPlayer
有一个toString
方法,如果您希望简洁:
Arrays.toString(theData.toArray());
我认为你的问题可能在另一个类中,如果你想输出数组列表中的内容,你必须迭代它,你的足球运动员需要一个to string方法,你可以使用这个对象是你的类,它有你发布的getdata方法
for(FootballPlayer each: object.getData())
System.out.println(each.toString());
回答得很好,但是
football player
必须覆盖toString
。
for(FootballPlayer each: object.getData())
System.out.println(each.toString());