swing - Progress bar in Java -
i have got form in java (swing) loading large amount of data database. want display progress bar while program gets loaded.
how can it?
the code follows:
import java.awt.*; import javax.swing.*; import java.awt.event.*; import java.sql.*; import java.applet.*; import java.util.*; import java.awt.color; public class bookshow extends jframe implements mouselistener, actionlistener { jpanel p1, p2, p3; jlabel l1, l2, l3, l4; imageicon image; jbutton b[] = new jbutton[84]; jbutton btnocc, btnbook, btnsel; resultset rs; private jmenubar menubar = new jmenubar(); private jmenuitem exit, home, save; private jmenu filemenu, gotomenu; public int cnt = 0, x = 150, y = 90, i, j, put = 0, k = 0, avail = 1, point, x1, y1, count = 0, quan; public static int prev_click = -1, xpos, ypos; public static int prev[] = new int[5]; public static int pos[][] = new int[5][2]; public string movname, movdate, movtime; public bookshow() { avail = 1; try { string sql = "select * pass"; string url = "jdbc:odbc:tbs"; connection con = drivermanager.getconnection(url); statement s = con.createstatement(); rs = s.executequery(sql); while (rs.next()) { movname = rs.getstring("movname"); movdate = rs.getstring("movdate"); movtime = rs.getstring("movtime"); quan = integer.parseint(rs.getstring("quantity")); } } catch (exception ex) { system.out.println(ex); } try { string sql = "delete pass"; string url = "jdbc:odbc:tbs"; connection con = drivermanager.getconnection(url); statement s = con.createstatement(); s.executeupdate(sql); con.close(); } catch (exception ex) { system.out.println(ex); } settitle("select ticket"); setdefaultcloseoperation(exit_on_close); p1 = new jpanel(); getcontentpane().add(p1); p1.setlayout(null); p1.setbackground(color.white); setjmenubar(menubar); filemenu = new jmenu("file"); menubar.add(filemenu); exit = new jmenuitem("exit"); exit.addactionlistener(this); filemenu.add(exit); exit.setaccelerator(keystroke.getkeystroke('e', event.ctrl_mask)); save = new jmenuitem("save"); save.addactionlistener(this); filemenu.add(save); save.setaccelerator(keystroke.getkeystroke('s', event.ctrl_mask)); gotomenu = new jmenu("go to"); menubar.add(gotomenu); home = new jmenuitem("home"); //exit.addactionlistener(this); gotomenu.add(home); home.setaccelerator(keystroke.getkeystroke('h', event.ctrl_mask)); p2 = new jpanel(); p2.setlayout(null); p2.setbackground(color.lightgray); p2.setbounds(100, 50, 500, 20); p1.add(p2); l1 = new jlabel("gold"); l1.setbounds(240, 0, 100, 20); p2.add(l1); l1.setbackground(color.red); try { string sql = "select * book"; string url = "jdbc:odbc:tbs"; connection con = drivermanager.getconnection(url); statement s = con.createstatement(); rs = s.executequery(sql); while (rs.next()) { string getname = rs.getstring("movname"); string getdate = rs.getstring("movdate"); string gettime = rs.getstring("movtime"); if (movname.equalsignorecase(getname) && movdate.equals(getdate) && movtime.equals(gettime)) { put = 1; break; } } } catch (exception ex) { system.out.println(ex); } (i = 1; <= 4; i++) { (j = 1; j <= 14; j++) { point = 0; b[cnt] = new jbutton(); b[cnt].setbounds(x, y, 20, 20); b[cnt].setbackground(color.white); p1.add(b[cnt]); if (put == 0) { try { string sql = "insert book values('" + movname + "','" + movtime + "','" + movdate + "'," + x + "," + y + ",1)"; string url = "jdbc:odbc:tbs"; connection con = drivermanager.getconnection(url); statement s = con.createstatement(); s.executeupdate(sql); con.close(); } catch (exception ex) { system.out.println(ex); } } else { try { string sql = "select * book"; string url = "jdbc:odbc:tbs"; connection con = drivermanager.getconnection(url); statement s = con.createstatement(); rs = s.executequery(sql); while (rs.next()) { string getname = rs.getstring("movname"); string getdate = rs.getstring("movdate"); string gettime = rs.getstring("movtime"); avail = integer.parseint(rs.getstring("avail")); if (movname.equalsignorecase(getname) && movdate.equals(getdate) && movtime.equals(gettime)) { k++; if (avail == 0 && k == (cnt + 1)) { b[cnt].setbackground(color.red); point = 1; b[cnt].setenabled(false); } } } } catch (exception ex) { system.out.println(ex); } } if (point == 0) { b[cnt].addmouselistener(this); } cnt++; x = x + 30; k = 0; } x = 150; y = y + 40; } y = 300; x = 150; p3 = new jpanel(); p3.setlayout(null); p3.setbackground(color.lightgray); p3.setbounds(100, 260, 500, 20); p1.add(p3); l2 = new jlabel("economy"); l2.setbounds(220, 0, 100, 20); p3.add(l2); l2.setbackground(color.red); (i = 1; <= 2; i++) { (j = 1; j <= 14; j++) { point = 0; b[cnt] = new jbutton(); b[cnt].setbounds(x, y, 20, 20); b[cnt].setbackground(color.white); p1.add(b[cnt]); if (put == 0) { try { string sql = "insert book values('" + movname + "','" + movtime + "','" + movdate + "'," + x + "," + y + ",1)"; string url = "jdbc:odbc:tbs"; connection con = drivermanager.getconnection(url); statement s = con.createstatement(); s.executeupdate(sql); con.close(); } catch (exception ex) { system.out.println(ex); } } else { try { string sql = "select * book"; string url = "jdbc:odbc:tbs"; connection con = drivermanager.getconnection(url); statement s = con.createstatement(); rs = s.executequery(sql); while (rs.next()) { string getname = rs.getstring("movname"); string getdate = rs.getstring("movdate"); string gettime = rs.getstring("movtime"); avail = integer.parseint(rs.getstring("avail")); if (movname.equalsignorecase(getname) && movdate.equals(getdate) && movtime.equals(gettime)) { k++; if (avail == 0 && k == (cnt + 1)) { b[cnt].setbackground(color.red); point = 1; b[cnt].setenabled(false); } } } } catch (exception ex) { system.out.println(ex); } } if (point == 0) { b[cnt].addmouselistener(this); } cnt++; x = x + 30; k = 0; } x = 150; y = y + 40; } image = new imageicon("screen.jpg"); l3 = new jlabel(image); l3.setbounds(70, y + 20, 600, 54); p1.add(l3); l4 = new jlabel("seat occupy"); l4.setbounds(140, 490, 100, 15); p1.add(l4); btnocc = new jbutton(); btnocc.setbounds(260, 490, 15, 15); btnocc.setbackground(color.white); p1.add(btnocc); l4 = new jlabel("booked seat"); l4.setbounds(320, 490, 80, 15); p1.add(l4); btnbook = new jbutton(); btnbook.setbounds(410, 490, 15, 15); btnbook.setbackground(color.red); p1.add(btnbook); l4 = new jlabel("current selection"); l4.setbounds(460, 490, 100, 15); p1.add(l4); btnsel = new jbutton(); btnsel.setbounds(570, 490, 15, 15); btnsel.setbackground(color.green); p1.add(btnsel); setsize(770, 650); setvisible(true); } public void mousepressed(mouseevent e) { } public void mousereleased(mouseevent e) { } public void mouseentered(mouseevent e) { cursor mycursor = new cursor(cursor.hand_cursor); setcursor(mycursor); } public void mouseexited(mouseevent e) { cursor mycursor = new cursor(cursor.default_cursor); setcursor(mycursor); } public void mouseclicked(mouseevent e) { int row, col, ex; (i = 0; < cnt; i++) { if (e.getsource().equals(b[i])) { if (count < quan) { prev[count] = i; b[prev[count]].setbackground(color.green); row = / 14; col = % 14; x1 = 150 + (30 * col); if (row >= 0 && row <= 3) { y1 = 90 + (40 * row); } else { y1 = 300 + (40 * (row - 4)); } pos[count][0] = x1; pos[count][1] = y1; count++; } else { ex = prev[0]; b[ex].setbackground(color.white); (int j = 0; j <= (count - 1); j++) { prev[j] = prev[j + 1]; pos[j][0] = pos[j + 1][0]; pos[j][1] = pos[j + 1][1]; } prev[count - 1] = i; row = / 14; col = % 14; x1 = 150 + (30 * col); if (row >= 0 && row <= 3) { y1 = 90 + (40 * row); } else { y1 = 300 + (40 * (row - 4)); } pos[count - 1][0] = x1; pos[count - 1][1] = y1; (int j = 0; j <= (count - 1); j++) { b[prev[j]].setbackground(color.green); } count = quan; } } } } public void actionperformed(actionevent e) { if (e.getsource() == save) { if (count != quan) { joptionpane.showmessagedialog(null, "please select exact numbers of seat", "error", joptionpane.error_message); } else { (i = 0; < count; i++) { try { string sql = "update book set avail=0 movname='" + movname + "' , movdate='" + movdate + "' , movtime='" + movtime + "' , x=" + pos[i][0] + " , y=" + pos[i][1] + " "; string url = "jdbc:odbc:tbs"; connection con = drivermanager.getconnection(url); statement s = con.createstatement(); s.executeupdate(sql); con.close(); } catch (exception ex) { system.out.println(ex); } setvisible(false); bookmain bm = new bookmain(); } } } } public static void main(string args[]) { bookshow mm = new bookshow(); } }
java progress bar tutorial should help.
another example can found in swingworker java docs entry.
instead of calling nextprimenumber() in case processnextbook().
to work out progress use similar idea bellow changing variables meaningful in code eg. setprogress(100 * booksprocessed.size() / books.size());
the code bellow should give basic idea how achieve looking for.
class primenumberstask extends swingworker<list<integer>, integer> { primenumberstask(jtextarea textarea, int numberstofind) { //initialize } @override public list<integer> doinbackground() { while (! enough && ! iscancelled()) { number = nextprimenumber(); publish(number); setprogress(100 * numbers.size() / numberstofind); } } return numbers; } @override protected void process(list<integer> chunks) { (int number : chunks) { textarea.append(number + "\n"); } } } jtextarea textarea = new jtextarea(); final jprogressbar progressbar = new jprogressbar(0, 100); primenumberstask task = new primenumberstask(textarea, n); task.addpropertychangelistener( new propertychangelistener() { public void propertychange(propertychangeevent evt) { if ("progress".equals(evt.getpropertyname())) { progressbar.setvalue((integer)evt.getnewvalue()); } } });
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