Java Calculator History Feature -
i hoping me feature store calculator's history string , have show history when user hits h key. i'm looking record each button pressed, including operators. appreciated. thanks.
public class gui extends jpanel implements keylistener { private jbutton b1; private jbutton b2; private jbutton b3; private jbutton b4; private jbutton b5; private jbutton b6; private jbutton b7; private jbutton b8; private jbutton b9; private jbutton b0; private jbutton add; private jbutton subtract; private jbutton multiply; private jbutton divide; private jbutton solve; private jbutton clear; private jbutton decimal; private jbutton sqrt; private jbutton recip; private jbutton backspace; private jbutton ms; private jbutton mr; private jbutton mc; private jbutton percent; private jbutton love; private jtextfield jtf; string display = ""; string mstore; string history; boolean multiplybool = false; boolean dividebool = false; boolean addbool = false; boolean subtractbool = false; boolean percentbool = false; imageicon heart = new imageicon("heartt.png"); private calclogic cl = new calclogic(); public gui(){ setlayout(new borderlayout()); jpanel p3 = new jpanel(new borderlayout()); p3.setfont(new font("arial", font.bold, 30)); p3.add(jtf = new jtextfield("0",12)); jtf.seteditable(false); jtf.sethorizontalalignment(jtextfield.right); jtf.setfont(new font("arial", font.bold, 40)); jpanel p2 = new jpanel(); p2.setbackground(color.cyan); p2.setlayout(new gridlayout(5,5,2,2)); //row 1 buttons p2.add(mc = new jbutton("mc")); mc.setfont(new font("arial", font.bold, 12)); p2.add(mr = new jbutton("mr")); mr.setfont(new font("arial", font.bold, 12)); p2.add(ms = new jbutton("ms")); ms.setfont(new font("arial", font.bold, 12)); p2.add(divide = new jbutton("\u00f7")); divide.setfont(new font("arial", font.plain, 20)); p2.add(backspace = new jbutton("\u2190")); backspace.setfont(new font("arial bold", font.bold, 18)); //row 2 buttons p2.add(b7 = new jbutton("7")); b7.setfont(new font("arial", font.plain, 20)); p2.add(b8 = new jbutton("8")); b8.setfont(new font("arial", font.plain, 20)); p2.add(b9 = new jbutton("9")); b9.setfont(new font("arial", font.plain, 20)); p2.add(multiply = new jbutton("\u00d7")); multiply.setfont(new font("arial", font.plain, 20)); p2.add(sqrt = new jbutton("\u221a")); sqrt.setfont(new font("arial", font.plain, 20)); //row 3 buttons p2.add(b4 = new jbutton("4")); b4.setfont(new font("arial", font.plain, 20)); p2.add(b5 = new jbutton("5")); b5.setfont(new font("arial", font.plain, 20)); p2.add(b6 = new jbutton("6")); b6.setfont(new font("arial", font.plain, 20)); p2.add(subtract = new jbutton("\u2212")); subtract.setfont(new font("arial", font.plain, 20)); p2.add(recip = new jbutton("1/x")); recip.setfont(new font("arial", font.plain, 14)); //row 4 buttons p2.add(b1 = new jbutton("1")); b1.setfont(new font("arial", font.plain, 20)); p2.add(b2 = new jbutton("2")); b2.setfont(new font("arial", font.plain, 20)); p2.add(b3 = new jbutton("3")); b3.setfont(new font("arial", font.plain, 20)); p2.add(add = new jbutton("+")); add.setfont(new font("arial", font.plain, 20)); p2.add(percent = new jbutton("%")); percent.setfont(new font("arial", font.plain, 20)); //row 5 buttons p2.add(b0 = new jbutton("0")); b0.setfont(new font("arial", font.plain, 20)); p2.add(decimal = new jbutton(".")); decimal.setfont(new font("arial", font.plain, 20)); p2.add(clear = new jbutton("c")); clear.setfont(new font("arial", font.plain, 20)); p2.add(solve = new jbutton("=")); solve.setfont(new font("arial", font.plain, 20)); p2.add(love = new jbutton(heart)); love.addactionlistener(new lovelistener()); add(p3, borderlayout.north); add(p2, borderlayout.center); this.setfocusable(true); addkeylistener(this); actionlistener buttonlistener = new buttonlistener(); actionlistener clearlistener = new clearlistener(); b7.addactionlistener(buttonlistener); b8.addactionlistener(buttonlistener); b9.addactionlistener(buttonlistener); add.addactionlistener(new addlistener()); b4.addactionlistener(buttonlistener); b5.addactionlistener(buttonlistener); b6.addactionlistener(buttonlistener); subtract.addactionlistener(new subtractlistener()); b1.addactionlistener(buttonlistener); b2.addactionlistener(buttonlistener); b3.addactionlistener(buttonlistener); multiply.addactionlistener(new multiplylistener()); b0.addactionlistener(buttonlistener); decimal.addactionlistener(buttonlistener); clear.addactionlistener(clearlistener); solve.addactionlistener(new solvelistener()); divide.addactionlistener(new dividelistener()); sqrt.addactionlistener(new sqrtlistener()); recip.addactionlistener(new reciplistener()); backspace.addactionlistener(new backspacelistener()); ms.addactionlistener(new mslistener()); mr.addactionlistener(new mrlistener()); mc.addactionlistener(new mclistener()); percent.addactionlistener(new percentlistener()); } //gui() private void action_clear(){ jtf.settext(""); display = jtf.gettext(); //op = ""; cl.settotal("0"); multiplybool = false; addbool = false; subtractbool = false; dividebool = false; } public class buttonlistener implements actionlistener { public void actionperformed(actionevent e) { string digit = e.getactioncommand(); jtf.settext(display + digit ); display = jtf.gettext(); playsound("click.wav"); } }//buttonlistener public class multiplylistener implements actionlistener { private calclogic cl = new calclogic(); public void actionperformed(actionevent e) { if(multiplybool == true) { if (percentbool==true) { cl.percentage(display); display = cl.getpercent(); } cl.multiply(display); jtf.settext(cl.getstring()); display = ""; }else if(dividebool == true) { if (percentbool==true) { cl.percentage(display); display = cl.getpercent(); } cl.divide(display); jtf.settext(cl.getstring()); display = ""; }else if(addbool == true) { if (percentbool==true) { cl.percentage(display); display = cl.getpercent(); cl.percmult(display); display = cl.getpercent(); } cl.add(display); jtf.settext(cl.getstring()); display = ""; }else if (subtractbool == true) { if (percentbool==true) { cl.percentage(display); display = cl.getpercent(); cl.percmult(display); display = cl.getpercent(); } cl.subtract(display); jtf.settext(cl.getstring()); display = ""; }else { cl.settotal(display); jtf.settext(""); multiplybool = true; dividebool = false; addbool = false; subtractbool = false; percentbool = false; display = ""; } multiplybool = true; dividebool = false; addbool = false; subtractbool = false; percentbool = false; } } public class dividelistener implements actionlistener { public void actionperformed(actionevent e) { if(multiplybool == true) { if (percentbool==true) { cl.percentage(display); display = cl.getpercent(); } cl.multiply(display); jtf.settext(cl.getstring()); display =""; }else if(dividebool == true) { if (percentbool==true) { cl.percentage(display); display = cl.getpercent(); } cl.divide(display); jtf.settext(cl.getstring()); display = ""; }else if(addbool == true) { if (percentbool==true) { cl.percentage(display); display = cl.getpercent(); cl.percmult(display); display = cl.getpercent(); } cl.add(display); jtf.settext(cl.getstring()); display = ""; }else if (subtractbool == true) { if (percentbool==true) { cl.percentage(display); display = cl.getpercent(); cl.percmult(display); display = cl.getpercent(); } cl.subtract(display); jtf.settext(cl.getstring()); display = ""; }else { cl.settotal(display); jtf.settext(""); dividebool = true; multiplybool = false; addbool = false; subtractbool = false; percentbool = false; display = ""; } multiplybool = false; dividebool = true; addbool = false; subtractbool = false; percentbool = false; } } public class addlistener implements actionlistener { public void actionperformed(actionevent e) { if(multiplybool == true) { if (percentbool==true) { cl.percentage(display); display = cl.getpercent(); } cl.multiply(display); jtf.settext(cl.getstring()); display =""; }else if(dividebool == true) { if (percentbool==true) { cl.percentage(display); display = cl.getpercent(); } cl.divide(display); jtf.settext(cl.getstring()); display = ""; }else if(addbool == true) { if (percentbool==true) { cl.percentage(display); display = cl.getpercent(); cl.percmult(display); display = cl.getpercent(); } cl.add(display); jtf.settext(cl.getstring()); display = ""; }else if (subtractbool == true) { if (percentbool==true) { cl.percentage(display); display = cl.getpercent(); cl.percmult(display); display = cl.getpercent(); } cl.subtract(display); jtf.settext(cl.getstring()); display = ""; }else { cl.settotal(display); jtf.settext(""); dividebool = false; multiplybool = false; addbool = true; subtractbool = false; percentbool = false; display = ""; } dividebool = false; multiplybool = false; subtractbool = false; addbool = true; percentbool = false; } }//addlistener public class subtractlistener implements actionlistener { public void actionperformed(actionevent e) { if(multiplybool == true) { if (percentbool==true) { cl.percentage(display); display = cl.getpercent(); } cl.multiply(display); jtf.settext(cl.getstring()); display =""; }else if(dividebool == true) { if (percentbool==true) { cl.percentage(display); display = cl.getpercent(); } cl.divide(display); jtf.settext(cl.getstring()); display = ""; }else if(addbool == true) { if (percentbool==true) { cl.percentage(display); display = cl.getpercent(); cl.percmult(display); display = cl.getpercent(); } cl.add(display); jtf.settext(cl.getstring()); display = ""; }else if (subtractbool == true) { if (percentbool==true) { cl.percentage(display); display = cl.getpercent(); cl.percmult(display); display = cl.getpercent(); } cl.subtract(display); jtf.settext(cl.getstring()); display = ""; }else { cl.settotal(display); jtf.settext(""); dividebool = false; multiplybool = false; addbool = false; subtractbool = true; percentbool = false; display = ""; } dividebool = false; multiplybool = false; addbool = false; subtractbool = true; percentbool = false; } }//subtractlistener public class sqrtlistener implements actionlistener { public void actionperformed(actionevent e) { cl.settotal(display); cl.squareroot(display); jtf.settext(cl.getstring()); playsound("click.wav"); } } public class reciplistener implements actionlistener { public void actionperformed(actionevent e) { cl.settotal(display); cl.reciprical(display); jtf.settext(cl.getstring()); playsound("click.wav"); } } public class backspacelistener implements actionlistener { public void actionperformed(actionevent e) { jtf.settext(""); display = ""; } } public class mslistener implements actionlistener { public void actionperformed(actionevent e) { mstore = jtf.gettext(); } } public class mrlistener implements actionlistener { public void actionperformed(actionevent e) { jtf.settext(mstore); display = mstore; } } public class mclistener implements actionlistener { public void actionperformed(actionevent e) { mstore = ""; } } public class percentlistener implements actionlistener { public void actionperformed(actionevent e) { percentbool = true; } } public class solvelistener implements actionlistener { public void actionperformed(actionevent e) { playsound("that_was_easy.wav"); if(multiplybool == true) { if (percentbool==true) { cl.percentage(display); display = cl.getpercent(); } cl.multiply(display); jtf.settext(cl.getstring()); }else if(dividebool == true) { if (percentbool==true) { cl.percentage(display); display = cl.getpercent(); } cl.divide(display); jtf.settext(cl.getstring()); }else if(addbool == true) { if (percentbool==true) { cl.percentage(display); display = cl.getpercent(); cl.percmult(display); display = cl.getpercent(); } cl.add(display); jtf.settext(cl.getstring()); }else if (subtractbool == true) { if (percentbool==true) { cl.percentage(display); display = cl.getpercent(); cl.percmult(display); display = cl.getpercent(); } cl.subtract(display); jtf.settext(cl.getstring()); } multiplybool = false; addbool = false; subtractbool = false; dividebool = false; percentbool = false; //display = jtf.gettext(); } } public class clearlistener implements actionlistener { public void actionperformed(actionevent e) { action_clear(); playsound("click.wav"); }//clearlistener } public void keytyped(keyevent e){ if(e.getkeycode() == keyevent.vk_h){ system.out.println(history); ) public void keytyped(keyevent e){ } public void keyreleased(keyevent e){ } }
just store each single line calculator command string array before erasing it. , show when press h.
for ex:
array array = new array(5) (you use collection classes make dynamic , more efficient)
123 (line#1 in calculator) >> array[0] + (line#2 in calculator) >> array[1] 34567 (line#3 in calculator) >> array[2] % (line#4 in calculator) >> array [3] 345 (line#5 in calculator) >> array [4] so on , forth.
regards,
Comments
Post a Comment