对于我们的midterms考试，我们应该创建一个功能齐全的科学计算器。我去YouTube和谷歌寻找任何解决方案，因为我的教授不能教我们如何使科学计算器工作。这是我到目前为止所做的。
import java.applet.*;
import java.awt.event.*;
import java.awt.*;
public class publiccalculator extends Applet implements ActionListener{
Label lblcasio = new Label("CASIO");
Label lblfx = new Label("fx-8265 PLUS");
Label lblnatural = new Label("NATURAL - V.P.A.M");
TextField txtfield1 = new TextField(30);
Button abs = new Button("Abs");
Button X2 = new Button("X^2");
Button X3 = new Button("X^3");
Button log = new Button("log");
Button sqrt = new Button("/---");
Button sin = new Button("sin");
Button cos = new Button("cos");
Button tan = new Button("tan");
Button pie = new Button("π");
Button E = new Button("E");
Button seven = new Button("7");
Button eight = new Button("8");
Button nine = new Button("9");
Button DEL = new Button("DEL");
Button AC = new Button("AC/CLEAR");
Button four = new Button("4");
Button five = new Button("5");
Button six = new Button("6");
Button multiply = new Button("X");
Button subtract = new Button("-");
Button one = new Button("1");
Button two = new Button("2");
Button three = new Button("3");
Button plus = new Button("+");
Button dive = new Button("/");
Button zero = new Button("0");
Button equals = new Button("=");
Button dot = new Button(".");
Button round = new Button("RND");
public void init(){
setLayout(null);
resize(500,400);
Font myCasio= new Font("Serif",Font.BOLD,18);
Font myFX= new Font("Serif",Font.BOLD,18);
Font myNatural = new Font("Serif",Font.BOLD,15);
lblcasio.setFont(myCasio);
lblfx.setFont(myFX);
lblnatural.setFont(myNatural);
add(lblcasio);
add(lblfx);
add(lblnatural);
add(txtfield1);
add(abs);
add(X2);
add(X3);
add(log);
add(sqrt);
add(sin);
add(cos);
add(tan);
add(pie);
add(E);
add(seven);
add(eight);
add(nine);
add(DEL);
add(AC);
add(four);
add(five);
add(six);
add(multiply);
add(subtract);
add(one);
add(two);
add(three);
add(plus);
add(dive);
add(zero);
add(equals);
add(dot);
add(round);
lblcasio.setBounds(60,0,100,20);
lblfx.setBounds(350,0,150,20);
lblnatural.setBounds(160,25,200,20);
txtfield1.setBounds(100,50,240,20);
abs.setBounds(100,75,35,35);
X2.setBounds(150,75,35,35);
X3.setBounds(200,75,35,35);
log.setBounds(250,75,35,35);
sqrt.setBounds(300,75,35,35);
sin.setBounds(100,120,35,35);
cos.setBounds(150,120,35,35);
tan.setBounds(200,120,35,35);
pie.setBounds(250,120,35,35);
E.setBounds(300,120,35,35);
seven.setBounds(100,165,35,35);
eight.setBounds(150,165,35,35);
nine.setBounds(200,165,35,35);
AC.setBounds(250,165,85,35);
four.setBounds(100,210,35,35);
five.setBounds(150,210,35,35);
six.setBounds(200,210,35,35);
multiply.setBounds(250,210,35,35);
subtract.setBounds(300,210,35,35);
one.setBounds(100,255,35,35);
two.setBounds(150,255,35,35);
three.setBounds(200,255,35,35);
plus.setBounds(250,255,35,35);
dive.setBounds(300,255,35,35);
zero.setBounds(100,300,35,35);
equals.setBounds(150,300,85,35);
dot.setBounds(250,300,35,35);
round.setBounds(300,300,35,35);
equals.addActionListener(this);
one.addActionListener(this);
two.addActionListener(this);
three.addActionListener(this);
plus.addActionListener(this);
dive.addActionListener(this);
four.addActionListener(this);
five.addActionListener(this);
six.addActionListener(this);
multiply.addActionListener(this);
subtract.addActionListener(this);
seven.addActionListener(this);
eight.addActionListener(this);
nine.addActionListener(this);
sin.addActionListener(this);
cos.addActionListener(this);
tan.addActionListener(this);
pie.addActionListener(this);
E.addActionListener(this);
abs.addActionListener(this);
X2.addActionListener(this);
X3.addActionListener(this);
log.addActionListener(this);
sqrt.addActionListener(this);
zero.addActionListener(this);
dot.addActionListener(this);
round.addActionListener(this);
txtfield1.setEnabled(false);
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==one){
txtfield1.setText(one.getActionCommand());
}
else if(e.getSource()==two){
txtfield1.setText(two.getActionCommand());
}
else if(e.getSource()==two){
txtfield1.setText(two.getActionCommand());
}
else if(e.getSource()==three){
txtfield1.setText(three.getActionCommand());
}
else if(e.getSource()==four){
txtfield1.setText(four.getActionCommand());
}
else if(e.getSource()==five){
txtfield1.setText(five.getActionCommand());
}
else if(e.getSource()==six){
txtfield1.setText(six.getActionCommand());
}
else if(e.getSource()==seven){
txtfield1.setText(seven.getActionCommand());
}
else if(e.getSource()==eight){
txtfield1.setText(eight.getActionCommand());
}
else if(e.getSource()==nine){
txtfield1.setText(nine.getActionCommand());
}
else if(e.getSource()==plus){
txtfield1.setText(plus.getActionCommand());
}
else if(e.getSource()==subtract){
txtfield1.setText(subtract.getActionCommand());
}
else if(e.getSource()==multiply){
txtfield1.setText(multiply.getActionCommand());
}
else if(e.getSource()==dive){
txtfield1.setText(dive.getActionCommand());
}
}
}
我不知道如何进行计算，这只是设计。除此之外，我不能连续输入数字。