java实现简单计算器功能
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2022-04-11 09:57:08
使用java来实现一个简单的计算器,供大家参考,具体内容如下最近使用java制作了一个计算器,菜单栏里的功能没有实现,只是写一个版式,仅仅实现了计算功能 ,如果想要实现菜单栏功能可自行在该代码的基础上...
使用java来实现一个简单的计算器,供大家参考,具体内容如下
最近使用java制作了一个计算器,菜单栏里的功能没有实现,只是写一个版式,仅仅实现了计算功能 ,如果想要实现菜单栏功能可自行在该代码的基础上去实现。
话不多说直接上代码
package test; import javax.swing.*; import java.awt.*; import java.awt.event.actionevent; import java.awt.event.actionlistener; public class calculate extends jframe implements actionlistener { private container ct; private jbutton[] jbs; private string[] str; private jtextfield jtextfield; //cal[0]用来存储第一次输入的数 //cal[1]用来存储运算符(+,-,*,/,%) //cal[2]用来存储第二次输入的数 //cal[3]用来存储结果 //cal[4]用来存储ms键所存储的数 //cal[5]用来获取要存入的值(用来给cal[4]赋值) private string[] cal = {"","","","","",""}; //_count和_count1始终相反,如果_count为true则表示正在输入cal[0]反之表示cal[0]输入完成,该输入cal[2] //当点过等号后将cal[3]的值赋给cal[0] private boolean _count = true; private boolean _count1 = false; public calculate() { super("计算器"); jbs = new jbutton[28]; ct = this.getcontentpane(); this.setbounds(100, 100, 315, 400); this.setdefaultcloseoperation(windowconstants.exit_on_close); ct.setlayout(null); //菜单栏 jmenubar jmenubar = new jmenubar(); jmenu jm = new jmenu("查看(v)"); jmenu jm1 = new jmenu("编辑(e)"); jmenu jm2 = new jmenu("帮助(h)"); jmenubar.add(jm); jmenubar.add(jm1); jmenubar.add(jm2); this.setjmenubar(jmenubar); //输出框 jtextfield = new jtextfield("0"); jtextfield.setfont(new font("宋体", font.bold, 25)); jtextfield.seteditable(false); jtextfield.sethorizontalalignment(jtextfield.right); jtextfield.setbounds(5, 5, 285, 65); ct.add(jtextfield); //按键 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 str = new string[]{"mc", "mr", "ms", "m+", "m-", "←", "ce", "c", "±", "√", "7", "8", "9", "/", "%", "4", "5", "6", "*", "1/x", "1", "2", "3", "-", "=", "0", ".", "+"}; int k = 0; for (int i = 75; i <= 195; i = i + 40) { for (int init = 10; init <= 290; init = init + 57) { jbutton jbutton = new jbutton(str[k]); jbs[k] = jbutton; jbutton.setbounds(init, i, 52, 35); ct.add(jbutton); k++; system.out.println(k); } } for (int i = 235; i < 265; i = i + 40) { for (int j = 10; j <= 181; j = j + 57) { jbutton jbutton = new jbutton(str[k]); jbutton.setbounds(j, i, 52, 35); ct.add(jbutton); jbs[k] = jbutton; k++; system.out.println(k); } } jbutton jbutton = new jbutton(str[k]); jbs[k] = jbutton; k++; system.out.println(k); jbutton.setbounds(240, 235, 52, 75); ct.add(jbutton); jbutton jbutton2 = new jbutton(str[k]); system.out.println(str[k]); jbutton2.setbounds(10, 275, 109, 35); ct.add(jbutton2); jbs[k] = jbutton2; k++; for (int i = 275; i < 310; i = i + 40) { for (int j = 124; j <= 181; j = j + 57) { jbutton jbutton1 = new jbutton(str[k]); jbutton1.setbounds(j, i, 52, 35); ct.add(jbutton1); jbs[k] = jbutton1; k++; } } for (int i = 0; i < 28; i++) { jbs[i].addactionlistener(this); } this.setvisible(true); } public static void main(string[] args) { new calculate(); } @override public void actionperformed(actionevent actionevent) { if (actionevent.getactioncommand().equals(".")){ method(actionevent); }else if (actionevent.getactioncommand().equals("0")){ method(actionevent); } else if (actionevent.getactioncommand().equals("1")){ method(actionevent); }else if(actionevent.getactioncommand().equals("2")){ method(actionevent); }else if (actionevent.getactioncommand().equals("3")){ method(actionevent); }else if (actionevent.getactioncommand().equals("4")){ method(actionevent); }else if (actionevent.getactioncommand().equals("5")){ method(actionevent); }else if (actionevent.getactioncommand().equals("6")){ method(actionevent); }else if (actionevent.getactioncommand().equals("7")){ method(actionevent); }else if (actionevent.getactioncommand().equals("8")){ method(actionevent); }else if (actionevent.getactioncommand().equals("9")){ method(actionevent); }else if (actionevent.getactioncommand().equals("±")){ if(_count){ if (cal[0].contains(".")){ cal[0] = string.valueof(double.parsedouble(cal[0]) * (-1)); jtextfield.settext(cal[0]); }else { cal[0] = string.valueof(integer.parseint(cal[0]) * (-1)); jtextfield.settext(cal[0]); } }else { if (cal[2].contains(".")){ cal[2] = string.valueof(double.parsedouble(cal[2]) * (-1)); jtextfield.settext(cal[2]); }else { cal[2] = string.valueof(integer.parseint(cal[2]) * (-1)); jtextfield.settext(cal[2]); } } }else if(actionevent.getactioncommand().equals("√")){ if(_count){ cal[0] = string.valueof(math.pow(double.parsedouble(cal[0]),0.5)); jtextfield.settext(cal[0]); }else { cal[2] = string.valueof(math.pow(double.parsedouble(cal[2]),0.5)); jtextfield.settext(cal[2]); } }else if(actionevent.getactioncommand().equals("1/x")){ if(_count){ cal[0] = string.valueof(1/double.parsedouble(cal[0])); jtextfield.settext(cal[0]); }else { cal[2] = string.valueof(1/double.parsedouble(cal[2])); jtextfield.settext(cal[2]); } }else if(actionevent.getactioncommand().equals("←")){ if(_count){ cal[0] = cal[0].substring(0,cal[0].length()-1); if(cal[0].equals("")){ jtextfield.settext("0"); }else { jtextfield.settext(cal[0]); } }else { cal[2] = cal[2].substring(0,cal[2].length()-1); if(cal[2].equals("")){ jtextfield.settext("0"); }else { jtextfield.settext(cal[2]); } } }else if(actionevent.getactioncommand().equals("ce")){ if (_count){ cal[0]=""; jtextfield.settext("0"); }else { cal[2]=""; jtextfield.settext("0"); } }else if(actionevent.getactioncommand().equals("c")){ _count = true; cal[0]=""; cal[1]=""; cal[2]=""; cal[3]=""; jtextfield.settext("0"); }else if (actionevent.getactioncommand().equals("+")){ if (!cal[0].equals("")&&!cal[2].equals("")){ if (cal[0].contains(".") || cal[2].contains(".")){ cal[0]=string.valueof(double.parsedouble(cal[0]) + double.parsedouble(cal[2])); }else { cal[0] = string.valueof(integer.parseint(cal[0]) + integer.parseint(cal[2])); } cal[2]=""; } cal[1] = "+"; _count=false; jtextfield.settext(cal[1]); }else if (actionevent.getactioncommand().equals("-")){ if (!cal[0].equals("")&&!cal[2].equals("")){ if (cal[0].contains(".") || cal[2].contains(".")){ cal[0]=string.valueof(double.parsedouble(cal[0]) - double.parsedouble(cal[2])); }else { cal[0] = string.valueof(integer.parseint(cal[0]) - integer.parseint(cal[2])); } cal[2]=""; } cal[1] = "-"; _count=false; jtextfield.settext(cal[1]); }else if (actionevent.getactioncommand().equals("*")){ if (!cal[0].equals("")&&!cal[2].equals("")){ if (cal[0].contains(".") || cal[2].contains(".")){ cal[0]=string.valueof(double.parsedouble(cal[0]) * double.parsedouble(cal[2])); }else { cal[0] = string.valueof(integer.parseint(cal[0]) * integer.parseint(cal[2])); } cal[2]=""; } cal[1] = "*"; _count=false; jtextfield.settext(cal[1]); }else if (actionevent.getactioncommand().equals("/")){ if (!cal[0].equals("")&&!cal[2].equals("")){ if (cal[0].contains(".") || cal[2].contains(".")){ cal[0]=string.valueof(double.parsedouble(cal[0]) / double.parsedouble(cal[2])); }else { cal[0] = string.valueof(integer.parseint(cal[0]) / integer.parseint(cal[2])); } cal[2]=""; } cal[1] = "/"; _count=false; jtextfield.settext(cal[1]); }else if (actionevent.getactioncommand().equals("%")){ cal[0]=string.valueof(integer.parseint(cal[0]) % integer.parseint(cal[2])); cal[2]=""; cal[1] = "%"; _count=false; jtextfield.settext(cal[1]); }else if (actionevent.getactioncommand().equals("=")){ if(cal[0].equals("")&&cal[2].equals("")){ jtextfield.settext("0"); }else if(!cal[0].equals("")&&cal[2].equals("")){ jtextfield.settext(cal[0]); }else if(!cal[0].equals("")&&!cal[2].equals("")){ if(cal[1].equals("+")){ if (cal[0].contains(".") || cal[2].contains(".")){ cal[3]=string.valueof(double.parsedouble(cal[0]) + double.parsedouble(cal[2])); }else { cal[3] = string.valueof(integer.parseint(cal[0]) + integer.parseint(cal[2])); } jtextfield.settext(cal[3]); }else if (cal[1].equals("-")){ if (cal[0].contains(".") || cal[2].contains(".")){ cal[3]=string.valueof(double.parsedouble(cal[0]) - double.parsedouble(cal[2])); }else { cal[3] = string.valueof(integer.parseint(cal[0]) - integer.parseint(cal[2])); } jtextfield.settext(cal[3]); }else if(cal[1].equals("*")){ if (cal[0].contains(".") || cal[2].contains(".")){ cal[3]=string.valueof(double.parsedouble(cal[0]) * double.parsedouble(cal[2])); }else { cal[3] = string.valueof(integer.parseint(cal[0]) * integer.parseint(cal[2])); } jtextfield.settext(cal[3]); }else if (cal[1].equals("/")){ if (cal[0].contains(".") || cal[2].contains(".")){ cal[3]=string.valueof(double.parsedouble(cal[0]) / double.parsedouble(cal[2])); }else { cal[3] = string.valueof(integer.parseint(cal[0]) / integer.parseint(cal[2])); } jtextfield.settext(cal[3]); }else if (cal[1].equals("%")){ cal[3]=string.valueof(integer.parseint(cal[0]) % integer.parseint(cal[2])); jtextfield.settext(cal[3]); } } cal[0]=cal[3]; cal[2]=""; _count=true; _count1 = true; cal[5]=cal[0]; }else if(actionevent.getactioncommand().equals("mc")){ cal[4]=""; }else if(actionevent.getactioncommand().equals("mr")){ if(_count){ if(!cal[4].equals("")){ cal[0]=cal[4]; jtextfield.settext(cal[0]); } }else { if(!cal[4].equals("")){ cal[2]=cal[4]; jtextfield.settext(cal[2]); } } }else if(actionevent.getactioncommand().equals("ms")){ if(_count){ cal[0]=""; } cal[4]=cal[5]; system.out.println("cal[5]"+cal[5]); system.out.println("ms:"+cal[4]); }else if(actionevent.getactioncommand().equals("m+")){ if(!cal[4].equals("")){ if (cal[4].contains(".") || cal[5].contains(".")){ cal[4]=string.valueof(double.parsedouble(cal[4]) + double.parsedouble(cal[5])); }else { cal[4] = string.valueof(integer.parseint(cal[4]) + integer.parseint(cal[5])); } } }else if(actionevent.getactioncommand().equals("m-")){ if(!cal[4].equals("")){ if (cal[4].contains(".") || cal[5].contains(".")){ cal[4]=string.valueof(double.parsedouble(cal[4]) - double.parsedouble(cal[5])); }else { cal[4] = string.valueof(integer.parseint(cal[4]) - integer.parseint(cal[5])); } } } } public void method(actionevent actionevent){ if(_count){ if (_count1){ cal[0]=""; _count1=false; } cal[0] += actionevent.getactioncommand(); cal[5]=cal[0]; system.out.println(cal[5]); }else { cal[2] += actionevent.getactioncommand(); cal[5]=cal[2]; } jtextfield.settext(actionevent.getactioncommand()); } }
效果图:
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