关于java：我怎样才能摆脱“静态”？

How can I get rid of “static”?

本问题已经有最佳答案，请猛点这里访问。

这是我的代码：

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public class Main extends JFrame{

static int NoOfUsers;
static String[][] Accounts = new String[NoOfUsers][2];

public static void main(String[] args){
Login();
}

private static void Login() {
final String FileName ="F:/TextFiles/loginaccs.txt";
try {
BufferedReader file = new BufferedReader(new InputStreamReader(new FileInputStream(FileName)));
int NoOfUsersL = Integer.parseInt(file.readLine());
String[][] Accounts = new String[NoOfUsersL][2];
NoOfUsers = NoOfUsersL;
for (int i=0; i<NoOfUsersL; i++) {
Accounts[i][0] = file.readLine();
Accounts[i][1] = file.readLine();
}
for (int i=0; i<NoOfUsersL; i++) {
System.out.println(Accounts[i][0]);
System.out.println(Accounts[i][1]);
}
file.close();

} catch (IOException e) {
System.out.println("ERROR: unable to read file.");
e.printStackTrace();
}

String username = null;
String password = null;
JTextField usernamejtf = new JTextField(username);
JPasswordField passwordjtf = new JPasswordField(password);
String[] buttons = {"Login","Create new account"};
Object[] InputDialog = {
"Username:", usernamejtf,"Password:", passwordjtf
};

do {

int option = JOptionPane.showOptionDialog(null,
InputDialog,
"Login",
JOptionPane.DEFAULT_OPTION,
JOptionPane.PLAIN_MESSAGE,
null,
buttons,
buttons[0]);
System.out.println(option); //Check

if (option == JOptionPane.CLOSED_OPTION ) {
return;
}
else if (option == 0) {
if (CheckAccount(username,password)) {
System.out.println("Logged in");
} else {
System.out.println("Wrong Password/Username");
}
} else if (option == 1) {
System.out.println("Create Account.");
}

} while (!(CheckAccount(username,password)));
}

private static boolean CheckAccount(String username, String password) {
for (int i=0; i>NoOfUsers; i++) {
if ((username == Accounts[i][0]) && (password == Accounts[i][1])) {
return true;
}
}
return false;
}

}

在"main"中，我调用了login()方法，Eclipse强迫我将单词"static"放在方法名前面。我是否可以修改程序，使行可以写为：private void login()…私有布尔支票帐户(…)…等？

[附加问题：因为"static"这个词，我不能把"public"这个词放在string[]accounts=new string[noolfusersl][2]之前；这使得checkaccount无法访问accounts数组。如何修改程序以解决此问题。]提前通知大家。

相关讨论

在静态qualifiers阶to remove方法，你必须让你的布尔变量的方法和实例变量。然后，你可以和你的呼叫login()JFrame对象实例化。P＞＜／

转换的方法也mixedcase /变量名称As to Java offical公约。恩，你把我# VB或C语言编程？P＞＜／

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import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;

import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;

public class Main extends JFrame {
private static final long serialVersionUID = -105943237549003486L;

private int numOfUsers;
private String[][] accounts;

public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
Main m = new Main();

m.login("F:/TextFiles/loginaccs.txt");
}
});
}

// Constructor, set up instance values here.
public Main() {
super();
}

private void login(final String fileName) {
try {
BufferedReader file = new BufferedReader(new InputStreamReader(new FileInputStream(fileName)));

numOfUsers = Integer.parseInt(file.readLine());
accounts = new String[numOfUsers][2];

for (int i = 0; i < numOfUsers; i++) {
accounts[i][0] = file.readLine();
accounts[i][1] = file.readLine();
}

for (int i = 0; i < numOfUsers; i++) {
System.out.println(accounts[i][0]);
System.out.println(accounts[i][1]);
}

file.close();

} catch (IOException e) {
System.out.println("ERROR: unable to read file.");
e.printStackTrace();
}

String username = null;
String password = null;
JTextField usernamejtf = new JTextField(username);
JPasswordField passwordjtf = new JPasswordField(password);
String[] buttons = {"Login","Create new account" };
Object[] InputDialog = {"Username:", usernamejtf,"Password:", passwordjtf };

do {
int option = JOptionPane.showOptionDialog(null, InputDialog,"Login", JOptionPane.DEFAULT_OPTION,
JOptionPane.PLAIN_MESSAGE, null, buttons, buttons[0]);
System.out.println(option); // Check

if (option == JOptionPane.CLOSED_OPTION) {
return;
} else if (option == 0) {
if (checkAccount(username, password)) {
System.out.println("Logged in");
} else {
System.out.println("Wrong Password/Username");
}
} else if (option == 1) {
System.out.println("Create Account.");
}

} while (!(checkAccount(username, password)));
}

private boolean checkAccount(String username, String password) {
for (int i = 0; i > numOfUsers; i++) {
if (username == accounts[i][0] && password == accounts[i][1]) {
return true;
}
}

return false;
}
}

使用：P＞＜／

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public static void main(String[] args){
Main main = new Main();
main.login();
}