本文实例为大家分享了java awt实现计算器的具体代码,供大家参考,具体内容如下 上课老师演示了一遍他的写法,由于没给代码,因此按着他的思路撸了一遍,感觉还很简单。 代码以及
本文实例为大家分享了java awt实现计算器的具体代码,供大家参考,具体内容如下
上课老师演示了一遍他的写法,由于没给代码,因此按着他的思路撸了一遍,感觉还很简单。
代码以及解释如下:
import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JTextField; public class Caculate1 { static String s1=""; static String s2=""; static int f=9; static int num1=0,num2=0; public static void main(String[] args) { int x=0,y=0,z=0; JFrame jf=new JFrame( "我的计算器"); jf.setBounds(0,0,300,400); // jf.setBackground(bgColor); jf.setVisible(true); jf.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); JTextField show=new JTextField("0"); //此处为布局:也就是定义五个容器,(也可以理解为将定义的JFrame空间分为5个容器) JPanel jp1=new JPanel(new GridLayout(1,3));//存储: JPanel jp2=new JPanel(new GridLayout(1,3)); JPanel jp3=new JPanel(new GridLayout(1,3)); JPanel jp4=new JPanel(new GridLayout(1,3)); JPanel jp5=new JPanel(new GridLayout(1,3)); JButton bt_add=new JButton("+"); JButton bt_sub=new JButton("-"); JButton bt_mul=new JButton("*"); JButton bt_div=new JButton("/"); JButton bt_7=new JButton("7"); JButton bt_8=new JButton("8"); JButton bt_9=new JButton("9"); JButton bt_4=new JButton("4"); JButton bt_5=new JButton("5"); JButton bt_6=new JButton("6"); JButton bt_1=new JButton("1"); JButton bt_2=new JButton("2"); JButton bt_3=new JButton("3"); JButton bt_0=new JButton("0"); JButton bt_c=new JButton("C"); JButton bt_equal=new JButton("="); jf.setLayout(new GridLayout(6,1)); //容器1 :添加 '+','-','*','/'按钮 jp1.add(bt_add); jp1.add(bt_sub); jp1.add(bt_mul); jp1.add(bt_div); //容器2:添加'7','8','9'按钮 jp2.add(bt_7); jp2.add(bt_8); jp2.add(bt_9); //容器3:添加'4','5','6'按钮 jp3.add(bt_4); jp3.add(bt_5); jp3.add(bt_6); //容器4:添加'1','2','3'按钮 jp4.add(bt_1); jp4.add(bt_2); jp4.add(bt_3); //容器5:添加'0','C','=' jp5.add(bt_0); jp5.add(bt_c); jp5.add(bt_equal); jf.add(show); jf.add(jp1); jf.add(jp2); jf.add(jp3); jf.add(jp4); jf.add(jp5); //元素已经定义好了,思路也很简单:(1)JFrame定义一个大容器jf,jf= 1个显示框(show)+5个容器,分别定义显示框和容器, //(2)类似树形添加元素的数据结构,为jf添加元素 //下面便是时间监听了(又称加载驱动) bt_9.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e) { s1=s1+9; show.setText(s1); } }); bt_8.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e) { s1=s1+8; show.setText(s1); } }); bt_7.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e) { s1=s1+7; show.setText(s1); } }); bt_6.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e) { s1=s1+6; show.setText(s1); } }); bt_5.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e) { s1=s1+5; show.setText(s1); } }); bt_4.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e) { s1=s1+4; show.setText(s1); } }); bt_3.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e) { s1=s1+3; show.setText(s1); } }); bt_0.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e) { s1=s1+0; show.setText(s1); } }); bt_2.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e) { s1=s1+2; show.setText(s1); } }); bt_1.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e) { s1=s1+1; show.setText(s1); } }); bt_0.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e) { s1=s1+0; show.setText(s1); } }); bt_equal.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e) { num1=Integer.valueOf(s2); num2=Integer.valueOf(s1); int z=0; char fg=' '; switch(f){ case 0: z=num1+num2; fg='+'; break; case 1: z=num1-num2; fg='-'; break; case 2: z=num1*num2; fg='*'; break; case 3: fg='/'; if(num2==0) num2=num2+1; z=num1/num2; break; default: break; } show.setText(s2+" "+fg+" "+s1+" = "+z); } }); bt_add.addActionListener(new ActionListener(){ @Override public void actionPerformed(ActionEvent e) { s2=s1; s1=""; f=0; show.setText(s2+"+"); } }); bt_sub.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub s2 = s1; s1 = ""; f = 1; show.setText(s2 + " - "); } }); bt_mul.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub s2 = s1; s1 = ""; f = 2; show.setText(s2 + " * "); } }); bt_div.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub s2 = s1; s1 = ""; f = 3; show.setText(s2 + " / "); } }); bt_c.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub s2 = ""; s1 = ""; num1 = 0; num2 = 0; f = 9; show.setText("0"); } }); } }
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