嗨，我的程序遇到了麻烦，因为我需要设置一个数组，以便轻松地增加它，因为它是销售，所以我像这样声明我的数组，我还没有完成我的程序，这是我的程序到目前为止。
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class We extends JFrame
{
public static JPanel panel2 = new JPanel();
public static String totallist,addprod;
public static int grandtotal,ve,xxx,z,x,adding,pay,totalp,totalc,payment;
public static JTextField in = new JTextField(z);
public static JTextField ki = new JTextField(15);
public static double disc,totalbayad,sukli;
public static int benta[] = new int [11];
public static String prod[] = new String[11];
public static void main(String[] args)
{
We frameTabel = new We();
prod[1] = "Palmolive";
prod[2] = "Egg";
prod[3] = "Milo";
prod[4] = "Noodles";
prod[5] = "PancitCanton";
prod[6] = "CornBeef";
prod[7] = "LigoSardines";
prod[8] = "CokeSakto";
prod[9] = "RcBig";
prod[10] = "GibsonLespaulGuitar";
benta[1] = 6;
benta[2] = 5;
benta[3] = 6;
benta[4] = 9;
benta[5] = 10;
benta[6] = 25;
benta[7] = 16;
benta[8] = 6;
benta[9] = 16;
benta[10] = 14000;
}
JFrame frame = new JFrame("Customer");
JFrame prodcho = new JFrame("Unofficial receipt");
JFrame want = new JFrame("Buy AGain");
JFrame ftinda = new JFrame("Item && Prices");
JButton blogin = new JButton("Login");
JPanel panel = new JPanel();
JTextField txuser = new JTextField(15);
JPasswordField pass = new JPasswordField(15);
JLabel lab = new JLabel("Username :");
JLabel pas = new JLabel("Password :");
JLabel cos;
//JPanel panel = new JPanel();
JButton y1;
JButton y2;
We()
{
super("Enter Your Account !");
setSize(300,200);
setLocation(500,280);
panel.setLayout (null);
txuser.setBounds(90,30,150,20);
pass.setBounds(90,65,150,20);
blogin.setBounds(110,100,80,20);
lab.setBounds(15,28,150,20);
pas.setBounds(15,63,150,20);
panel.add(lab);
panel.add(pas);
panel.add(blogin);
panel.add(txuser);
panel.add(pass);
getContentPane().add(panel);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
actionlogin();
}
public void actionlogin()
{
blogin.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent ae)
{
String puname = txuser.getText();
String ppaswd = pass.getText();
if(puname.equals("vincent") && ppaswd.equals("puge"))
{
setVisible(false);
JPanel panel1 = new JPanel();
frame.setVisible(true);
frame.setSize(300,200);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new GridLayout());
cos = new JLabel("Do you have a Customer ?");
y1 = new JButton("Yes");
y2 = new JButton("No");
panel1.setLayout(null);
cos.setBounds(70,30,150,20);
y1.setBounds(80,65,150,20);
y2.setBounds(140,65,150,20);
y1.setSize(55,30);
y2.setSize(55,30);
panel1.add(y1);
panel1.add(y2);
panel1.add(cos);
frame.add(panel1);
y1.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent ae)
{
Object source = ae.getSource();
if(source == y1)
{
frame.setVisible(false);
//--------------------------------------
int boundsStart=10;
panel.l2.add(new JLabel("-Product-").setBounds(20,boundsStart,150,20));
boundsStart+=20;
for (int i=1; i<11; i++)
{
panel2.add(new JLabel(i+"."+prod[i]).setBounds(20,boundsStart,150,20));
boundsStart+=20;
}
boundsStart = 30; //reset bounds counter
for (int i=1; i<11; i++)
{
panel2.add(new JLabel(""+benta[i]).setBounds(20,boundsStart,150,20));
boundsStart+=20;
}
//You could then change the other JLabels that came after this point in the same way I just did
//price,ent,law, and qx
//--------------------------------------
JLabel vince = new JLabel("-Product-");
JLabel l1 = new JLabel("1."+prod[1]);
JLabel l2 = new JLabel("2."+prod[2]);
JLabel l3 = new JLabel("3."+prod[3]);
JLabel l4 = new JLabel("4."+prod[4]);
JLabel l5 = new JLabel("5."+prod[5]);
JLabel l6 = new JLabel("6."+prod[6]);
JLabel l7 = new JLabel("7."+prod[7]);
JLabel l8 = new JLabel("8."+prod[8]);
JLabel l9 = new JLabel("9."+prod[9]);
JLabel l10 = new JLabel("10."+prod[10]);
JLabel p1 = new JLabel(""+benta[1]);
JLabel p2 = new JLabel(""+benta[2]);
JLabel p3 = new JLabel(""+benta[3]);
JLabel p4 = new JLabel(""+benta[4]);
JLabel p5 = new JLabel(""+benta[5]);
JLabel p6 = new JLabel(""+benta[6]);
JLabel p7 = new JLabel(""+benta[7]);
JLabel p8 = new JLabel(""+benta[8]);
JLabel p9 = new JLabel(""+benta[9]);
JLabel p10 = new JLabel(""+benta[10]);
JLabel price = new JLabel("-Price-");
JButton ent = new JButton("Enter");
JLabel law = new JLabel("Enter No. of Product");
JLabel qx = new JLabel("Enter Quantity");
ftinda.setVisible(true);
ftinda.setSize(350,350);
ftinda.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
ftinda.setLayout(new GridLayout());
panel2.setLayout(null);
vince.setBounds(20,10,150,20);
l1.setBounds(20,30,150,20);
l2.setBounds(20,50,150,20);
l3.setBounds(20,70,150,20);
l4.setBounds(20,90,150,20);
l5.setBounds(20,110,150,20);
l6.setBounds(20,130,150,20);
l7.setBounds(20,150,150,20);
l8.setBounds(20,170,150,20);
l9.setBounds(20,190,150,20);
l10.setBounds(20,210,150,20);
p1.setBounds(230,30,150,20);
p2.setBounds(230,50,150,20);
p3.setBounds(230,70,150,20);
p4.setBounds(230,90,150,20);
p5.setBounds(230,110,150,20);
p6.setBounds(230,130,150,20);
p7.setBounds(230,150,150,20);
p8.setBounds(230,170,150,20);
p9.setBounds(230,190,150,20);
p10.setBounds(230,210,150,20);
price.setBounds(225,10,150,20);
in.setBounds(150,250,150,20);
law.setBounds(20,253,150,20);
qx.setBounds(20,280,150,20);
ki.setBounds(150,280,150,20);
ent.setBounds(220,250,150,20);
in.setSize(42,20);
ki.setSize(42,20);
ent.setSize(65,50);
panel2.add(vince);
panel2.add(l1);
panel2.add(l2);
panel2.add(l3);
panel2.add(l4);
panel2.add(l5);
panel2.add(l6);
panel2.add(l7);
panel2.add(l8);
panel2.add(l9);
panel2.add(l10);
panel2.add(p1);
panel2.add(p2);
panel2.add(p3);
panel2.add(p4);
panel2.add(p5);
panel2.add(p6);
panel2.add(p7);
panel2.add(p8);
panel2.add(p9);
panel2.add(p10);
panel2.add(price);
panel2.add(in);
panel2.add(law);
panel2.add(ent);
panel2.add(qx);
panel2.add(ki);
ftinda.add(panel2);
ent.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent ae)
{
ftinda.setVisible(false);
JPanel panel3 = new JPanel();
JLabel cos1 = new JLabel("Do you want to buy more ?");
JButton yy = new JButton("Yes");
JButton nn = new JButton("No");
panel3.setLayout(null);
cos1.setBounds(70,30,150,20);
yy.setBounds(80,65,150,20);
nn.setBounds(140,65,150,20);
yy.setSize(55,30);
nn.setSize(55,30);
panel3.add(cos1);
panel3.add(yy);
panel3.add(nn);
want.add(panel3);
want.setVisible(true);
want.setSize(300,200);
want.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
want.setLayout(new GridLayout());
addprod = prod[];
adding = benta[];
totalp =
totalc = totalp;
totallist = totallist + addprod +"" +x+ "pcs = "+totalc+"pesos";
nn.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent ea)
{
Object source1 = ea.getSource();
{
if(source1 == nn)
{
JPanel panel4 = new JPanel();
panel4.setLayout(null);
prodcho.setVisible(true);
prodcho.setSize(300,200);
prodcho.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
prodcho.setLayout(new GridLayout());
prodcho.add(panel4);
}
}
}
});
}
});
}
}
});
}
else
{
JOptionPane.showMessageDialog(null,"Wrong Password / Username");
txuser.setText("");
pass.setText("");
txuser.requestFocus();
}
}
});
}
}
最佳答案
正如PeterMmm所说，arrayLists应该能够解决你的困境。 ArrayLists 允许您非常轻松地创建任何类型的数组，并且具有非常好的界面，例如
mylist.add(element)
Maroun Maroun 还提出了一个有效的观点，即您可以使用循环更好地实现这一点，这样您就可以避免代码中的大量重复，但如果您对此感到满意，则没有必要这样做。
希望以下使用ArrayList的示例可以帮助您: http://javarevisited.blogspot.de/2011/05/example-of-arraylist-in-java-tutorial.html
如果您想了解有关 arraylist 的更多信息，请参阅以下文档: http://docs.oracle.com/javase/7/docs/api/java/util/ArrayList.html
我的最后一个提示是，在查看您的代码时，向您的按钮添加一个 actionListener，因为目前它什么也不做；)
ent.addActionListener(new ActionListener()
{
@Override
public void actionPerformed( ActionEvent e )
{
//..do stuff here or call a function to do stuff :)
}
});
关于java - Gui 中的数组递增，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/21704742/