-3
我已经给出了一个返回二维对象数组的方法。如何使用下面给出的方法从对象数组中获取数据,并将其放入表或标签中以查看存储在其中的数据?这是我曾尝试没有成功:如何使用此方法从二维数组中获取数据?
Object[][] diffs = comp.getDifferences(comp.getName());
for(Object diff : diffs){
table.addItem(diff);
}
这是他们给我的方法:
public Object[][] getDifferences(String table) {
List<Tuple<Object, Object>> difference = differences.get(table);
Object[][] array = new Object[difference.size()][2];
for (int i = 0; i < array.length; i++) {
array[i][0] = difference.get(i).item1();
array[i][1] = difference.get(i).item2();
}
return array;
}
有什么建议?
UPDATE:3:52 CST 3/17:
我想出这个...
Table table = new Table();
Object[][] diffs = comp.getDifferences(comp.getName());
for(int i = 0; i < diffs.length; i++){
table.addItem(diffs[i][0]);
table.addItem(diffs[i][1]);
}
这也不能正常工作。我得到一个指向该行的NPE:
Object[][] array = new Object[difference.size()][2];
下面是完整的比较(COMP)类:
public class Compare implements Serializable {
private String name;
private Map<String, List<Tuple<Object, Object>>> differences = new HashMap<String, List<Tuple<Object, Object>>>();
public Compare(String name) {
this.name = name;
}
public Compare(byte[] bytes) throws IOException, ClassNotFoundException {
ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
ObjectInput ois = new ObjectInputStream(bis);
Compare compare = (Compare)ois.readObject();
this.name = compare.name;
this.differences = compare.differences;
bis.close();
ois.close();
}
public String getName() {
return name;
}
public boolean addDifference(String table, Object control, Object test) {
if (!differences.containsKey(table)) {
differences.put(table, new ArrayList<Tuple<Object, Object>>());
}
differences.get(table).add(new Tuple<Object, Object>(control, test));
return true;
}
public Object[][] getDifferences(String table) {
List<Tuple<Object, Object>> difference = differences.get(table);
Object[][] array = new Object[difference.size()][2];
for (int i = 0; i < array.length; i++) {
array[i][0] = difference.get(i).item1();
array[i][1] = difference.get(i).item2();
}
return array;
}
public byte[] toBytes() throws IOException {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
ObjectOutput oos = new ObjectOutputStream(bos);
oos.writeObject(this);
oos.flush();
byte[] bytes = bos.toByteArray();
bos.close();
oos.close();
return bytes;
}
private class Tuple<X, Y> implements Serializable {
private final X x;
private final Y y;
public Tuple(X x, Y y) {
this.x = x;
this.y = y;
}
public X item1() {
return this.x;
}
public Y item2() {
return this.y;
}
}
public static void main(String[] args) throws FileNotFoundException, IOException, ClassNotFoundException {
Compare foo = new Compare("Test Compare");
foo.addDifference("AGREEMENT", 89, 90);
foo.addDifference("AGREEMENT", "foo", "bar");
foo.addDifference("ACCOUNT", 123, "Dog");
ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(new File("C:\\Users\\uttbm01\\Documents\\Export\\foo.cmp")));
oos.writeObject(foo);
oos.close();
ObjectInputStream ois = new ObjectInputStream(new FileInputStream(new File("C:\\Users\\uttbm01\\Documents\\Export\\foo.cmp")));
Compare bar = (Compare)ois.readObject();
ois.close();
System.out.println();
}
}
这是什么试图比较?它是比较一个字符串与另一个字符串?你的预期结果是什么? – user681574
该方法不返回两个数组。它返回*一个*二维数组。您可以通过提供行和列索引来访问其成员 - 例如diffs [0] [0]和diffs [0] [1]。 –
该方法从差异列表中提取“名称”元素。然后将这些提取的名称添加到双数组中,您可以通过调用array [i] [0] == array [i] [1]来访问每个元素,并比较它们以查看它们是否是相同的元素。您可以调用==或.equal来比较两个元素。 – Juniar