我的文件是1.txt,我想用java打开它,按下按钮,该文件应该打开!!
是否有任何命令通过actionlistener打开文件并用按钮修补它?
这是我在java中的简单applet程序..
import java.awt.*;
import java.applet.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.PrintWriter;
import java.util.Scanner;
import java.util.logging.Level;
import java.util.logging.Logger;
public class CalculatorApplet extends Applet implements ActionListener {
Button save, view;
Label fname, lname, email, city, phno;
TextField t, u, v, w, x;
Label ans;
Scanner sc = new Scanner(System.in);
@Override
public void init() {
setLayout(null);
// create label to display enter no
fname = new Label("Enter First Name : ");
fname.setBounds(10, 50, 100, 20);
lname = new Label("Enter Last Name : ");
lname.setBounds(10, 70, 100, 20);
email = new Label("Enter Email : ");
email.setBounds(10, 90, 80, 20);
city = new Label("Enter City : ");
city.setBounds(10, 110, 80, 20);
phno = new Label("Enter Phno : ");
phno.setBounds(10, 130, 80, 20);
// create textbox for entering number
t = new TextField();
t.setBounds(120, 50, 200, 20);
u = new TextField();
u.setBounds(120, 70, 100, 20);
v = new TextField();
v.setBounds(120, 90, 200, 20);
w = new TextField();
w.setBounds(120, 110, 80, 20);
x = new TextField();
x.setBounds(120, 130, 80, 20);
// create button for finding sqr
save = new Button("Save");
save.setBounds(120, 150, 70, 30);
// add the action listner on this button
save.addActionListener(this);
// create button
view = new Button("View");
view.setBounds(190, 150, 70, 30);
// add the action listner on this button
view.addActionListener(this);
// add all the components to the frame
add(fname);
add(lname);
add(email);
add(city);
add(phno);
add(t);
add(u);
add(v);
add(w);
add(x);
add(save);
add(view);
}
@Override
public void actionPerformed(ActionEvent e) {
String fnme = t.getText();
String lnme = u.getText();
String emal = v.getText();
String cty = w.getText();
String phn = x.getText();
if (e.getSource() == save) {
try (PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter("1.txt", true)))) {
out.println("First Name :" + fnme);
out.println("Last Name :" + lnme);
out.println("Email Name : " + emal);
out.println("City : " + cty);
out.println("Contact : " + phn);
out.println("----------------------------------------\n");
out.println("----------------------------------------\n");
out.close();
t.setText("");
u.setText("");
v.setText("");
w.setText("");
x.setText("");
} catch (Exception ex) {
Logger.getLogger(CalculatorApplet.class.getName()).log(Level.SEVERE, null, ex);
}
}else if(e.getSource() == view){
// what to type in here????
// needed code here!!!
}
}
}
我只想打开文件,别的......
答案 0 :(得分:1)
可以使用Desktop类让系统打开,编辑,打印,浏览文件。
Desktop.getDesktop().open(file);
这意味着外部应用程序。
您可以考虑编写HTML文件,以使其更加时尚。
@MadProgrammer关注后:
对于沙盒applet,在互联网上运行时有额外的安全限制, 让applet打开第二个窗口并显示文本可能会更好。然后不需要将文本写入文件。
如果您希望文件在您的服务器上 来保存输入的数据,那将是错误的想法:applet在客户端的浏览器中运行。< / p>
答案 1 :(得分:0)
下面是在我的netbeans GUI程序中打开.exe的代码:
{{1}}