我有一个小但难以捉摸的问题。我有2个课程，我的课程和主要课程是：
package bankaccount;
public class BankFrame extends javax.swing.JFrame {
我的另一堂课：
public class Account {
I want to print out a string from Account class to a jTextarea in the
main class.
我按照要求在这里发布了两个类的代码。 首先是主要课程：
package bankaccount;
import java.util.Random;
public class BankFrame extends javax.swing.JFrame {
public static BankFrame mainContainer;
int dAmount = 0; // Int for Deposit
int wAmount = 0; // Int Withdrawal
String firstName;
String surName;
String name;
String phone;
String email;
String id;
int numberSize;
String b;
String correctId;
String accountN;
double balance;
String newid;
String passw; // Password
String password;
String userId;
String userPassword;
String savedId;
/**
* Creates new form BankFrame
*/
public BankFrame() {
initComponents();
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
// I have deleted a lot of init components here.
private void registerBtnActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
Login newUser = new Login(savedId,password);
password = (regPasswordIn.getText());
// newUser.setThePassword(password); //Sparar lösenordet i klassen Login.
//newUser.setTheId(savedId); //Sparar personnumret i samma klass.
if (password.equals("")){
outReg.setText("Enter a password as required.");
}else{
CorrectId(); //Here follows methods to validate a swedish ID-number
}
}
public void CorrectId() {
id = (regIdIn.getText()); //Ta in id
id = id.replaceAll("-","").trim();
if (id.equals("")){
outReg.setText("Enter your id as required.");
}else{
if (validateNumbers(id)){
RegPanel.setVisible(false); //Cardlayout
LoginPanel.setVisible(true);
base.removeAll();
base.add(LoginPanel);
revalidate();
repaint();
savedId=id;
}else{
outReg.setText("Enter a valid ID-number before proceeding"); //Varningstext som även kommer upp
}
}
}
public boolean validateNumbers(String nm) {
System.out.println("Hej"+nm.length());//debugg
boolean returnvar;
numberSize = nm.length();
if (numberSize != 10) {
outReg.setText("Only 10 numbers is allowed!");
returnvar= false;
} else {
returnvar= true;
}
return returnvar;
}
private void infoBtnActionPerformed(java.awt.event.ActionEvent evt) {
//Randomgenerators to create a accountnumber. Deleted for this post.
}
Account Customer = new Account(accountN, balance, name,email, phone);
//Deleted variables for customer information
// System.out.println(timsAccount.getNumber() + " name " + timsAccount.getCustomerName());
}
private void sBtnActionPerformed(java.awt.event.ActionEvent evt) {
}
private void tBtnActionPerformed(java.awt.event.ActionEvent evt) {
Account Customer = new Account();
wAmount = Integer.parseInt(withdrawalIn.getText());
//Amount to withdraw
dAmount = Integer.parseInt(depositIn.getText());
//Amount to deposit
Customer.deposit(dAmount);
Customer.withdrawal(wAmount);
}
public void print2transaction (String in){
System.out.println(in);
outIn.setText(in);
}
private void bBtnActionPerformed(java.awt.event.ActionEvent evt) {
}
public void print2balance (String in) {
Account Customer = new Account(accountN, balance, name,email, phone);
double f = Customer.getBalance();
if (f==0){ //This code is not working. You can ignore this
outIn.setText("Dishonored customer! Your balance is now $0. If the required amount of $50,000 is not deposited on your account within one week, it will bli terminated according to our rules. Shoo!");
}else{
balanceOut.setText("Balance is " + Customer.getBalance());
//balanceOut.setText
}
}
private void loginBtnActionPerformed(java.awt.event.ActionEvent evt) {
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(BankFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(BankFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(BankFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(BankFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
BankFrame bankFrame = new BankFrame();
bankFrame.mainContainer=bankFrame;
/* Create and display the form */
java.awt.EventQueue.invokeLater(() -> {
new BankFrame().setVisible(true);
});
}
现在是Account类：
package bankaccount;
import java.util.ArrayList;
public class Account {
private String accountN;
private double balance;
private String b;
private String name;
private String email;
private String phone;
private String d;
private String w;
public Account() {
}
public Account(String accountN, double balance, String name, String email, String phone) {
this.accountN = accountN;
this.balance = balance;
this.name = name;
this.email = email;
this.phone = phone;
}
public String getAccountN() {
return accountN;
}
public void setAccountN(String accountN) {
this.accountN = accountN;
}
public double getBalance() {
return balance;
}
public void setBalance(double balance) {
this.balance = balance;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPhone() {
return phone;
}
public void setPhone(String phone) {
this.phone = phone;
}
public class AccountArray {
private String[] theAccount = {accountN, b, name, email, phone};
}
public void deposit(int depositAmount) {
this.balance += depositAmount;
BankFrame.mainContainer.print2transaction(" Dearest customer! Depostit of $" + depositAmount + " is acknowledged. New balance is $" + this.balance + ". We are happy to have you, beloved member of the Capitalist family!");
String b = "" + balance;
String d = "" + depositAmount;
}
public void withdrawal(int withdrawalAmount) {
if ((this.balance - withdrawalAmount) == 0 && this.balance != 0) {
BankFrame.mainContainer.print2transaction("Withdrawal acknowledged. Dishonored customer! Your balance is now $0. If the required amount of $50,000 is not deposited on your account within one week, it will bli terminated according to our rules. Shoo!");
String b = "" + balance;
String w = "" + withdrawalAmount;
/*
if((this.balance-withdrawalAmount) == 0){ //Kämpat med denna kod men fick inte till det
if(this.balance ==0){
toTheTransaction.print2transaction("Withdrawal denied. Dishonored customer! Your balance is $0. If the required amount of $50,000 is not deposited on your account within one week, it will bli terminated according to our rules. Shoo! ");
*/
} else if (this.balance - withdrawalAmount < 0.0D) {
BankFrame.mainContainer.print2transaction("Dear customer. Since only $" + this.balance + " is available on your account, your withdrawal was not granted. Goodbye!");
String b = "" + balance;
String w = "" + withdrawalAmount;
} else {
this.balance -= withdrawalAmount;
BankFrame.mainContainer.print2transaction("Dearest customer. The withdrawal of $" + withdrawalAmount + " was granted. Remainig balance is: " + this.balance + "$ . We at the Capitalist Bank wishes you a pleasent day!");
String b = "" + balance;
String w = "" + withdrawalAmount;
}
结束......
答案 0 :(得分：0)
<强>问题 观看我的注释行：
.div-table div.appuntamento {
background-color: #f3f2de;
padding: 3px 5px;
border: 1px solid #d7dde6;
border-radius: 5px;
}
.div-table {
display:table;
width:auto;
}
.div-table-row{
display:table-row;
width:auto;
clear:both;
height: 45px;
}
.div-table-col {
float:left;/*fix for buggy browsers*/
display:table-column;
width:154px;
}
.div-table-row .div-table-col{
border-left: 1px solid #d7dde6;
border-right: 1px solid #d7dde6;
border-top: 1px solid #d7dde6;
min-height: 44px;
}
.div-table-first-col {
float:left;/*fix for buggy browsers*/
display:table-column;
text-align: right;
width: 45px;
}
.div-table-first-col div{
padding: 3px 5px;
}
解决方案： 的 BankFrame.java：
public class AccountArray {
private String[] theAccount = {accountN, b, name, email, phone};
}
BankFrame toTheTransaction = new BankFrame(); // This is the problem line, this instance of BankFrame is different than the one that is showing the window
public void deposit(double depositAmount) {
this.balance += depositAmount;
if(this.balance !=0.0D){
toTheTransaction.print2transaction(" Dearest customer...");
类：AccountArray
package bankaccount;
public class BankFrame extends javax.swing.JFrame {
public static BankFrame mainContainer;
...
public void print2transaction (String in){
System.out.println(in);
outIn.setText(in);
}
..
public static void main(String[] args)
{
BankFrame bankFrame=new BankFrame();
bankFrame.mainContainer=bankFrame;
...
...
...
}