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[英]how to re-order an arrayList of JLabel to show a Label on the top of the list
[英]How to show a arraylist of string on jlabel?
嗨,我有一個字符串數組列表,我想在JLabel上顯示該數組列表的內容,用空格或逗號分隔。 但是它只顯示了一個String,最后一個是String。
public void ShowMovie(int idMovie) throws SQLException, IOException {
int ID = idMovie;
String IDMOVIE = Integer.toString(ID);
IDMovieLabel.setText(IDMOVIE);
try {
Class.forName("com.mysql.jdbc.Driver");
} catch (ClassNotFoundException ex) {
Logger.getLogger(Cover.class.getName()).log(Level.SEVERE, null, ex);
}
con = DriverManager.getConnection("jdbc:mysql://localhost/whichmovie", "Asis", "dekrayat24");
String sql = "SELECT Title,Year,Country,recomendacion,Cover,Rating,NameDirec,Name FROM movie "
+ "Inner join direction on (movie.idMovie=direction.idMovie5)"
+ "Inner join director on (direction.idDirector=director.idDirector)"
+ "Inner join cast on (movie.idMovie=cast.idMovie4)"
+ "Inner join actor on (cast.idActor=actor.idActor)"
+ "where idMovie= '" + ID + "'";
st = con.prepareStatement(sql);
rs = st.executeQuery(sql);
while (rs.next()) {
String titulo = rs.getString(1);
int añoInt = rs.getInt(2);
String año = Integer.toString(añoInt);
byte[] imagedataCover = rs.getBytes("Country");
byte[] imagedataCover1 = rs.getBytes("Cover");
format = new ImageIcon(imagedataCover);
format2 = new ImageIcon(imagedataCover1);
TituloLabel.setText(titulo);
AñoLabel.setText(año);
CountryLabel.setIcon(format);
DirectorLabel.setText(rs.getString(7));
int Recomend = rs.getInt(4);
String Recom = Integer.toString(Recomend);
RecommendLabel.setText(Recom);
int Rating = rs.getInt(6);
String Rat = Integer.toString(Rating);
RatingLabel.setText(Rat);
starRater1.setSelection(Rating);
starRater1.setEnabled(false);
Image imgEscalada = format2.getImage().getScaledInstance(CoverLabel.getWidth(),
CoverLabel.getHeight(), Image.SCALE_SMOOTH);
Icon iconoEscalado = new ImageIcon(imgEscalada);
CoverLabel.setIcon(iconoEscalado);
ArrayList<String> actors = new ArrayList<>();
actors.add(rs.getString(8));
System.out.println(actors);// Here i can see i get 9 actors.
StringBuilder sb = new StringBuilder();
boolean first = true;
for (String s : actors) {
if (!first) {
sb.append(' ');
}
sb.append(s);
first = false;
}
CastLabel1.setText(sb.toString());
}
rs.close();
st.close();
con.close();
}
有什么幫助嗎?
編輯:不幸的是,沒有解決方案對我有幫助,也許我在方法上做錯了,我發布了完整的方法。
問題是您要重置for循環中每個步驟的標簽,而不是創建累積結果。 見下文:
StringBuilder buf = new StringBuilder();
for(int i = 0; i < actors.size(); i++){
buf.append(actors.get(i));
if(i < actors.size() -1){
buf.append(" ");
}
}
CastLabel1.setText(buf.toString())
String text = "";
for(int i = 0; i < actors.size(); i++){
text = text + actors.get(i);
if(i < actors.size() - 2){
text = text + ", ";
}
}
CastLabel1.setText(text);
你應該建立你想顯示第一 ,然后將其設置為標簽的文本字符串:
StringBuilder sb = new StringBuilder();
boolean first = true;
for (String s : actors) {
if (!first)
sb.append(' ');
sb.append(s);
first = false;
}
CastLabel1.setText(sb.toString());
您當前正在做的是在每次迭代過程中更改整個標簽文本,因此最終文本是列表中最后一個元素的文本。
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