java做个小程序 100-200代码就行了

微信公开课小程序热门讨论「java做个小程序 100-200代码就行了」最新回复-说你邮箱把我以前做的贪吃蛇发给你或者+qq381236663
我给你一个功能强大的计算器!已运行通过!importjavax.swing.*;importjava.awt.*;importjava.awt.event.*;publicclassCalculator3extendsJFrameimplementsActionListener{privatebooleandotExist,operated,equaled;//帮助运算的布尔变量privatedoublestoredNumber;//目前的结果privatecharlastOperator;//表示上一运算符privateJTextFieldoperation;//结果栏privateJButtondot,plus,minus,multi,div,sqrt,equal,changePN,clear;//运算符privateJButton[]numbers;//数字//构造者publicCalculator3(){setTitle(Calculator);//初始化变量dotExist=false;//表示当前的数是否有小数点operated=false;//表示任意运算符是否被按下equaled=false;//表示等号是否被按下storedNumber=0;lastOperator=?;//初始化窗口变量operation=newJTextField(0);operation.setEditable(false);numbers=newJButton[10];for(inti=0;i10;i++)numbers[i]=newJButton(+i);dot=newJButton(.);plus=newJButton(+);minus=newJButton(-);multi=newJButton(*);div=newJButton(/);sqrt=newJButton(√);equal=newJButton(=);changePN=newJButton(±);clear=newJButton(AC);//将窗口物体放入窗口GridBagLayoutlayout=newGridBagLayout();getContentPane().setLayout(layout);addComponent(layout,operation,0,0,4,1);addComponent(layout,numbers[1],1,0,1,1);addComponent(layout,numbers[2],1,1,1,1);addComponent(layout,numbers[3],1,2,1,1);addComponent(layout,numbers[4],2,0,1,1);addComponent(layout,numbers[5],2,1,1,1);addComponent(layout,numbers[6],2,2,1,1);addComponent(layout,numbers[7],3,0,1,1);addComponent(layout,numbers[8],3,1,1,1);addComponent(layout,numbers[9],3,2,1,1);addComponent(layout,dot,4,0,1,1);addComponent(layout,numbers[0],4,1,1,1);addComponent(layout,sqrt,4,2,1,1);addComponent(layout,plus,1,3,1,1);addComponent(layout,minus,2,3,1,1);addComponent(layout,multi,3,3,1,1);addComponent(layout,div,4,3,1,1);addComponent(layout,equal,5,0,2,1);addComponent(layout,changePN,5,2,1,1);addComponent(layout,clear,5,3,1,1);}//对按钮进行反应的方法publicvoidactionPerformed(ActionEvente){JButtonbtn=(JButton)e.getSource();if(btn==clear){operation.setText(0);dotExist=false;storedNumber=0;lastOperator=?;}elseif(btn==equal){operate(=);equaled=true;}elseif(btn==plus){operate(+);equaled=false;}elseif(btn==minus){operate(-);equaled=false;}elseif(btn==multi){operate(*);equaled=false;}elseif(btn==div){operate(/);equaled=false;}elseif(btn==changePN){operate(p);operate(=);equaled=true;}elseif(btn==sqrt){operate(s);operate(=);equaled=true;}else{if(equaled)storedNumber=0;for(inti=0;i10;i++)if(btn==numbers[i]){if(operation.getText().equals(0))operation.setText(+i);elseif(!operated)operation.setText(operation.getText()+i);else{operation.setText(+i);operated=false;}}if(btn==dot&&!dotExist){operation.setText(operation.getText()+.);dotExist=true;}}}//进行运算的方法privatevoidoperate(charoperator){doublecurrentNumber=Double.valueOf(operation.getText()).doubleValue();if(lastOperator==?)storedNumber=currentNumber;elseif(lastOperator==+)storedNumber+=currentNumber;elseif(lastOperator==-)storedNumber-=currentNumber;elseif(lastOperator==*)storedNumber*=currentNumber;elseif(lastOperator==/)storedNumber/=currentNumber;elseif(lastOperator==p)storedNumber*=-1;elseif(lastOperator==s)storedNumber=Math.sqrt(currentNumber);elseif(lastOperator===&&equaled)storedNumber=currentNumber;operation.setText(+storedNumber);operated=true;lastOperator=operator;}//快捷使用GridBagLayout的方法privatevoidaddComponent(GridBagLayoutlayout,Componentcomponent,introw,intcol,intwidth,intheight){GridBagConstraintsconstraints=newGridBagConstraints();constraints.fill=GridBagConstraints.BOTH;constraints.insets=newInsets(10,2,10,2);constraints.weightx=100;constraints.weighty=100;constraints.gridx=col;constraints.gridy=row;constraints.gridwidth=width;constraints.gridheight=height;layout.setConstraints(component,constraints);if(componentinstanceofJButton)((JButton)component).addActionListener(this);getContentPane().add(component);}//主方法初始化并显示窗口publicstaticvoidmain(String[]args){Calculator3calc=newCalculator3();calc.setSize(290,400);calc.setVisible(true);}} 更多有关「java做个小程序 100-200代码就行了」的疑问请扫码关注微信公开课+小程序！