Java swing simple calculator

 

The Code repetition rate is too high. It should be optimized and there is no time.

The setactioncommand () method can greatly reduce the amount of code.

Code:

1. Import java. AWT .*;
2. Import java. AWT. event .*;
3. Import javax. Swing .*;
5. Public class test1 {
6. Public static void main (string [] ARGs ){
7. Calculator c = new calculator ();
8. C. setvisible (true );
9. }
10. }
12. Class calculator extends jframe implements actionlistener {
13. Container P;
14. Jsplitpane JSP;
15. Jtextfield resultfiled = new jtextfield ("0 ");
16. Jpanel resultpane = new jpanel ();
17. Jpanel btnpane = new jpanel ();
18. Static float OP1 = 0;
19. Static int Len = 0;
20. Static float OP2 = 0;
21. Static string output = "";
22. Static string OPP = "";
23. Static Boolean flag1 = true;
24. Static Boolean flag2 = true;
25. String [] btns = {"1", "2", "3", "+ ",
26. "4", "5", "6 ","-",
27. "7", "8", "9 ","*",
28. "0", "= ",".","/"};
29. Jbutton [] BTN = new jbutton [16];
31. Public calculator (){
32. P = getcontentpane ();
33. Setbounds (100,100,300,300 );
34. Settitle ("Calculator ");
35. Setresizable (false );
36. Seticonimage (New imageicon ("16.png"). getimage (); // set the icon displayed in the form
37. Setdefaclocloseoperation (jframe. exit_on_close );
38. Setcursor (cursor. getpredefinedcursor (cursor. hand_cursor); // set the Mouse shape
39. This. setbackground (new color (255, 0,255 ));
40. Jbutton cz = new jbutton ("reset ");
41. CZ. setbounds (0, 0, 80, 20 );
42. CZ. setbackground (new color (65,105,225 ));
43. CZ. setforeground (new color (255, 0, 0 ));
44. CZ. addactionlistener (this );
45. Resultfiled. seteditable (false );
46. Resultfiled. sethorizontalalignment (jtextfield. Right); // set the display from right to left
47. Resultfiled. setcolumns (12 );
48. Resultfiled. setfont (new font ("", Font. Plain, 14 ));
49. Resultfiled. setbackground (new color (0,255,127 ));
50. Resultfiled. setforeground (new color (255, 0, 0 ));
51. Jbutton QX = new jbutton ("cancel ");
52. QX. addactionlistener (this );
53. QX. setbackground (new color (65,105,225 ));
54. QX. setforeground (new color (255, 0, 0 ));
55. QX. setsize (80, 20 );
56. Resultpane. setlayout (New flowlayout ());
57. Resultpane. Add (CZ );
58. Resultpane. Add (resultfiled );
59. Resultpane. Add (QX );
60. Btnpane. setlayout (New gridlayout (4, 5, 7, 7 ));
61. For (INT I = 0; I <16; I ++ ){
62. BTN [I] = new jbutton (btns [I]);
63. BTN [I]. setborderpainted (true );
64. BTN [I]. setcontentareafilled (true );
65. BTN [I]. setfont (new font ("", Font. Bold, 25 ));
66. BTN [I]. setbackground (new color (255,255, 0 ));
67. BTN [I]. setforeground (new color (255, 0, 0 ));
68. BTN [I]. addactionlistener (this );
69. Btnpane. Add (BTN [I]);
70. }
71. JSP = new jsplitpane (jsplitpane. vertical_split, resultpane, btnpane );
72. JSP. setdividersize (3 );
73. JSP. setdividerlocation (35 );
74. P. Add (JSP, borderlayout. center );
75. }
76. Public void actionreceivmed (actionevent e ){
77. If (flag1 &&
78. (E. getactioncommand () = "1" |
79. E. getactioncommand () = "2" |
80. E. getactioncommand () = "3" |
81. E. getactioncommand () = "4" |
82. E. getactioncommand () = "5" |
83. E. getactioncommand () = "6" |
84. E. getactioncommand () = "7" |
85. E. getactioncommand () = "8" |
86. E. getactioncommand () = "9" |
87. E. getactioncommand () = "0" |
88. E. getactioncommand () = ".")){
89. Output + = E. getactioncommand ();
90. Resultfiled. settext (output );
91. }
92. If (E. getactioncommand () = "= "){
93. If (flag1 ){
94. OP2 = float. parsefloat (resultfiled. gettext (). substring (LEN + 1 ));
95. Output + = E. getactioncommand ();
96. If (OPP = "+ "){
97. Output + = (OP1 + OP2) + "";
98. } If (OPP = "-"){
99. Output + = (OP1 + OP2) + "";
100. } If (OPP = "*"){
101. Output + = (OP1 * OP2) + "";
102. } If (OPP = "/"){
103. If (op2-0.0 = 0 ){
104. Output + = "error ";
105. } Else {
106. Output + = (OP1/OP2) + "";
107. }
108. }
109. Resultfiled. settext (output );
110. Flag1 = false;
111. }
112. }
113. If (E. getactioncommand () = "reset "){
114. OP1 = 0;
115. OP2 = 0;
116. OPP = "";
117. Output = "";
118. Flag1 = true;
119. Flag2 = true;
120. Resultfiled. settext ("0 ");
121. }
122. If (E. getactioncommand () = "+" |
123. E. getactioncommand () = "-" |
124. E. getactioncommand () = "*" |
125. E. getactioncommand () = "/"){
126. If (flag2 ){
127. OP1 = float. parsefloat (resultfiled. gettext ());
128. Len = resultfiled. gettext (). Length ();
129. OPP = E. getactioncommand ();
130. Output + = E. getactioncommand ();
131. Resultfiled. settext (output );
132. Flag2 = false;
133. }
134. }
135. }
136. }