Java:如何将代码从按钮单击更改为onload
我有以下代码可以正常工作,但我希望在加载时显示人名,而不是在用户单击按钮时显示人名。 我将如何实现这一点Java:如何将代码从按钮单击更改为onload,java,swing,onload,Java,Swing,Onload,我有以下代码可以正常工作,但我希望在加载时显示人名,而不是在用户单击按钮时显示人名。 我将如何实现这一点 public class NameSwing implements ActionListener { private JTextArea tf = new JTextArea(20, 20); private JFrame f = new JFrame("names"); private JButton b = new JButton("view"); st
public class NameSwing implements ActionListener {
private JTextArea tf = new JTextArea(20, 20);
private JFrame f = new JFrame("names");
private JButton b = new JButton("view");
static String fullName;
public NameSwing() {
f.add(new JLabel("Name"));
tf.setEditable(true);
f.add(tf);
b.addActionListener(this);
f.add(b);
f.setLayout(new FlowLayout());
f.setSize(600, 600);
f.setVisible(true);
}
@Override
public void actionPerformed(ActionEvent e) {
if (e.getSource() == b) {
tf.setText(fullName);
}
}
public static void main(String[] args) throws FileNotFoundException, IOException {
NameSwing nameSwing = new NameSwing();
Names t = new Names();
t.OpenFile();
t.ReadFile();
t.CloseFile();
fullName = Names.fullName;
}
}
名称
类别:
package names;
public class Names {
Scanner scan;
static String Firstname = null;
static String Surname;
static String Fullname;
static String fullName;
String myArray[];
public void OpenFile() {
try {
scan = new Scanner(new File("/Users/nikhilpatel/NetBeansProjects/Names/src/names/test.txt"));
System.out.println("File found!");
} catch (Exception e) {
System.out.println("File not found");
}
}
public void ReadFile() {
while (scan.hasNext()) {
Firstname = scan.next();
Surname = scan.next();
Fullname += Firstname + " " + Surname + "\n";
fullName = Fullname.replace("null", "");
System.out.println(fullName);
}
}
public void CloseFile() {
scan.close();
}
}
只需在中添加
actionPerformed
内容。或者在actionPerformed
中创建一个新方法(称为buttonClick或其他方法)并将其命名为1.)和2。)在main
的末尾,根据您想要实现结果的“优雅程度”,有几种选择,一种方法是重构代码,将actionPerformed
方法体提取为更独立的方法,然后在main
中调用该公共方法:
@Override
public void actionPerformed(ActionEvent e) {
fillTextArea();
}
public void fillTextArea() {
// You can drop this line, this Listener is registered for 'b', so 'b'
// is the only one who fires the ActionEvent, not need to recheck
//
// if (e.getSource() == b) {
tf.setText(fullName);
}
public static void main(String[] args) throws FileNotFoundException, IOException {
NameSwing nameSwing = new NameSwing();
Names t = new Names();
t.OpenFile();
t.ReadFile();
t.CloseFile();
fullName = Names.fullName;
// Invoke the new method
nameSwing.fillTextArea();
}
另一种方法(也是一种棘手的方法)是像这样简单地调用fromb
:
// Add a getter for 'b'
public JButton getButton() {
return b;
}
public static void main(String[] args) throws FileNotFoundException, IOException {
NameSwing nameSwing = new NameSwing();
Names t = new Names();
t.OpenFile();
t.ReadFile();
t.CloseFile();
fullName = Names.fullName;
// This will simulate a 'click' on the button, loading the names
nameSwing.getButton().doClick();
}
希望这有助于1)请学习类、方法和属性名称的通用(特别是用于名称的大小写)并一致使用。2) Fullname+=Firstname+“”+姓氏+“\n”代码>不要硬编码EOL。Java有它的属性。3) 给定数据的形式,我倾向于在JTable
// Add a getter for 'b'
public JButton getButton() {
return b;
}
public static void main(String[] args) throws FileNotFoundException, IOException {
NameSwing nameSwing = new NameSwing();
Names t = new Names();
t.OpenFile();
t.ReadFile();
t.CloseFile();
fullName = Names.fullName;
// This will simulate a 'click' on the button, loading the names
nameSwing.getButton().doClick();
}