java - How to "hide" a JFrame using a JButton outside the main -
so i've completed project, last thing being "hide" button. teacher never gave instruction on do, since it's annoying me , can't find answer works, figured i'd ask folks.
i've tried:
setextendedstate(jframe.iconified)//causes compiler error, can't find variable namesetstate(jframe.iconified)//same issue, "can't find symbol", or rather find variablesetvisible(false)//this doesn't work bc hides entire frame, , can't without closing program.
i use container c = getcontentpane() create pane, inside main use:
classname variablename = new classname() create parameters. this how taught , have use way now(since teacher wants) have noticed there other ways achieve same goal.
any input specific program awesome! thanks!
my program follows(i posted whole thing nothing may left out):
import java.awt.*; import java.awt.event.*; import javax.swing.*; import java.util.arrays; public class project9 extends jframe { font f1 = new font("serif", font.bold, 30); font f2 = new font("serif", font.plain, 18); private bookitem[] bookarray = new bookitem[10]; private jlabel headerlbl; private jlabel messageslbl; private jtextfield idlabelfld; private jtextfield idfld; private jtextfield pricelabelfld; private jtextfield pricefld; private jtextfield numinstocklabelfld; private jtextfield numinstockfld; private jtextfield codelabelfld; private jtextfield codefld; private jtextfield messagesfld; private jbutton insertbtn; private jbutton deletebtn; private jbutton displaybtn; private jbutton displayonebtn; private jbutton hidebtn; private jbutton clearbtn; private string input = ""; private string displayonestr = ""; private int idinput = 0; private double priceinput = 0.0; private int numinstockinput = 0; private int codeinput = 0; private int index = 0; private int numitems = 0; private int responsecode = 0; private container c = getcontentpane(); //main method, sets arrayframe params public static void main(string[] args) { project9 arrayframe = new project9(); arrayframe.setsize(555,450); arrayframe.setvisible(true); arrayframe.setdefaultcloseoperation(jframe.exit_on_close); } //constructor public project9() { //creates array (int = 0; < bookarray.length; i++) { bookarray[i] = new bookitem(); system.out.println(bookarray[i]); } settitle("project 9"); c.setlayout(new flowlayout()); headerlbl = new jlabel("data entry: bestbargainbook store"); headerlbl.setfont(f1); c.add(headerlbl); idlabelfld = new jtextfield("enter id:", 15); idlabelfld.seteditable(false); c.add(idlabelfld); idfld = new jtextfield(25); c.add(idfld); pricelabelfld = new jtextfield("enter price:", 15); pricelabelfld.seteditable(false); c.add(pricelabelfld); pricefld = new jtextfield(25); c.add(pricefld); numinstocklabelfld = new jtextfield("enter number in stock:", 15); numinstocklabelfld.seteditable(false); c.add(numinstocklabelfld); numinstockfld = new jtextfield(25); c.add(numinstockfld); codelabelfld = new jtextfield("enter code: 1,2,3 or 4:", 15); codelabelfld.seteditable(false); c.add(codelabelfld); codefld = new jtextfield(25); c.add(codefld); insertbtn = new jbutton("insert"); c.add(insertbtn); deletebtn = new jbutton("delete"); c.add(deletebtn); displaybtn = new jbutton("display"); c.add(displaybtn); displayonebtn = new jbutton("displayone"); c.add(displayonebtn); hidebtn = new jbutton("hide"); c.add(hidebtn); clearbtn = new jbutton("clear"); c.add(clearbtn); messageslbl = new jlabel("messages:"); messageslbl.setfont(f2); c.add(messageslbl); messagesfld = new jtextfield(30); c.add(messagesfld); //event listeners insertbtn.addactionlistener(new eventhandler()); deletebtn.addactionlistener(new eventhandler()); displaybtn.addactionlistener(new eventhandler()); displayonebtn.addactionlistener(new eventhandler()); hidebtn.addactionlistener(new eventhandler()); clearbtn.addactionlistener(new eventhandler()); }//end constructor private class eventhandler implements actionlistener { public void actionperformed(actionevent ev) { if (ev.getsource() == insertbtn) { input = idfld.gettext(); idinput = integer.parseint(input); input = pricefld.gettext(); priceinput = double.parsedouble(input); input = numinstockfld.gettext(); numinstockinput = integer.parseint(input); input = codefld.gettext(); codeinput = integer.parseint(input); insert(idinput, priceinput, numinstockinput, codeinput); if (responsecode == 0) { messagesfld.settext("array full. cannot insert book id: " + idinput); } else if (responsecode == 1) { messagesfld.settext("succesful insertion of " + idinput); } else if (responsecode == -1) { messagesfld.settext("duplicate id: " + idinput); } } else if (ev.getsource() == deletebtn) { input = idfld.gettext(); idinput = integer.parseint(input); delete(idinput); if (responsecode == 1) { messagesfld.settext("successful delete of book id: " + idinput); } else if (responsecode == -1) { messagesfld.settext("id: " + idinput + " not found."); } } else if (ev.getsource() == displaybtn) { (index = 0; index < bookarray.length; index++) { bookarray[index].display(); } } else if (ev.getsource() == displayonebtn) { input = idfld.gettext(); idinput = integer.parseint(input); (index = 0; index < bookarray.length; index++) { if (bookarray[index].getid() == idinput) { bookarray[index].getid(); bookarray[index].getprice(); bookarray[index].getnumberinstock(); bookarray[index].getcode(); messagesfld.settext("id: " + bookarray[index].getid() + " price: " + bookarray[index].getprice() + " number in stock: " + bookarray[index].getnumberinstock() + " code: " + bookarray[index].getcode()); } } } else if (ev.getsource() == hidebtn) { } else if (ev.getsource() == clearbtn) { idfld.settext(""); pricefld.settext(""); numinstockfld.settext(""); codefld.settext(""); messagesfld.settext(""); repaint(); } }//end actionperformed }//end handler //insert method, called when insert button pressed public int insert(int id, double prc, int numinstock, int code) { if (numitems == 10) { system.out.println("\nthe array full, please delete entry"); responsecode = 0; return responsecode; } (index = 0; index < bookarray.length; index++) { if (bookarray[index].getid() == id) { system.out.println("\nthat id exists"); responsecode = -1; return responsecode; } else if (bookarray[index].getid() == 0) { bookarray[index] = new bookitem(id, prc, numinstock, code); numitems++; system.out.println("\n" + idinput + "\n" + priceinput + "\n" + numinstockinput + "\n" + codeinput + "\n" + index); system.out.println("\nid: " + bookarray[index].getid()); system.out.println("price: " + bookarray[index].getprice()); system.out.println("nis: " + bookarray[index].getnumberinstock()); system.out.println("code: " + bookarray[index].getcode()); system.out.println("items in array: " + numitems); responsecode = 1; return responsecode; } } return responsecode; }//end insert method //delete method, called when delete button pressed public int delete(int id) { (index = 0; index < bookarray.length; index++) { if (bookarray[index].getid() == id) { bookarray[index].setid(0); bookarray[index].setprice(0); bookarray[index].setstock(0); bookarray[index].setcode(0); numitems--; system.out.println("\nsuccessful deletion"); responsecode = 1; return responsecode; } } responsecode = -1; return responsecode; }//end delete method }//end app
in actionlistener "hide" button basic code be:
jbutton button = (jbutton)e.getsource(); window window = swingutilities.windowforcomponent( button ); jframe frame = (jframe)window; frame.setstate(jframe.iconified); this way not depending on instance variable identifies frame. using source object of event way make listeners generic , flexible.
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