Use jfilechooser to select an image file and display it on the panel

Disadvantage: You need to click a click to display the image. For example, you can display the image only when the maximum value is minimized.

Code:

1. Import java. AWT .*;
2. Import java. Io. file;
3. Import java. AWT. event .*;
4. Import javax. Swing. filechooser .*;
5. Import javax. Swing .*;
7. Public class test4 {
8. Public static void main (string [] ARGs ){
9. Filechooser fc = new filechooser ();
10. }
11. }
13. Class filechooser extends jframe implements actionlistener {
14. Container P;
15. Static int I = 0;
16. Jpanel imgpane;
17. Jlabel labeimag;
18. Jtoolbar TB = new jtoolbar ();
19. Jbutton BTN = new jbutton ("O ");
20. Public filechooser (){
21. P = getcontentpane ();
22. BTN. settooltiptext ("open to select image"); // The button prompts
23. BTN. setforeground (color. Red );
24. BTN. addactionlistener (this );
25. Imgpane = new jpanel ();
26. TB. Add (BTN );
27. P. Add (TB, borderlayout. North );
28. Setbounds (100,100,800,600 );
29. Setdefaclocloseoperation (exit_on_close );
30. Setvisible (true );
31. }
33. Public void actionreceivmed (actionevent e ){
34. If (E. getsource () = BTN ){
35. Jfilechooser choosefile = new jfilechooser ();
36. Choosefile. addchoosablefilefilter (New filecanchoose ());
37. Int returnval = choosefile. showopendialog (null );
38. If (returnval = choosefile. approve_option ){
39. If (I! = 0 ){
40. Imgpane. Remove (labeimag); // remove the previous image
41. }
42. I ++;
43. File F = choosefile. getselectedfile ();
44. String fname = f. getabsolutepath ();
45. Labeimag = new jlabel ();
46. Labeimag. seticon (New imageicon (fname ));
47. Labeimag. sethorizontalalignment (jlabel. center); // you can specify the center of the image.
48. Imgpane. Add (labeimag, borderlayout. center );
49. P. Add (imgpane, borderlayout. center );
50. }
51. }
52. }
53. }
55. Class filecanchoose extends filefilter {// file filter, set to select the corresponding type of file
56. Public Boolean accept (File file ){
57. String name = file. getname ();
58. Return (name. tolowercase (). endswith (". GIF") |
59. Name. tolowercase (). endswith (". jpg") |
60. Name. tolowercase (). endswith (". BMP") |
61. Name. tolowercase (). endswith (". PNG") |
62. Name. tolowercase (). endswith (". jpeg "));
63. }
64. Public String getdescription (){
65. Return "image files:. GIF,. jpg,. BMP,. PNG,. jpeg ";
66. }
67. }