java - JFrame not presenting any Components -


i using following code create simple jframe, reason doesn't show components, blank frame. why happening? created frames bunch of times , can't figure out wrong. code is:

main(){     jframe frame = new jframe("colorizer | by: nonamesl");     frame.setsize(400,200);     frame.setlocationrelativeto(null);     frame.setvisible(true);     frame.setdefaultcloseoperation(jframe.exit_on_close);     jpanel panel = new jpanel();     frame.setcontentpane(panel);     textfield=new jtextfield("enter name!");     textfield.setbounds(0,0,40,200);     textfield.setvisible(true);     frame.getcontentpane().add(textfield);     button=new jbutton("go!");     button.setbounds(0, 200, 40, 200);     button.setvisible(true);     frame.getcontentpane().add(button);     rectangle=new recshape(color.white);     rectangle.setbounds(0,40,400,160);     rectangle.setvisible(false);     frame.getcontentpane().add(rectangle);     main.frame=frame;     registerbutton(); }

the recshape class class created create rectangle shape on screen. wrong?

put frame.setvisible(true); after adding components to jframe, , show added components. moreover, should use specific layout rather setting bounds components. can use layout manager.


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