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Going to a new URL from an Applet |
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You have to use:
getAppletContext().showDocument
(new URL("http://www.whatever.com"));
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or
getAppletContext().showDocument
(new URL("http://www.whatever.com"),"HTML frame ID");
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If "HTML frame ID" do not exists then a new browser window will be opened. The following "HTML frame ID" have special meanings :
"_self" current frame
"_parent" parent frame
"_top" base frame
"_blank" new window
For example, we want to display lowres.html page if resolution is 640x480 else the hires.html is used.
import java.applet.*;
import java.awt.*;
import java.net.*;
public class whatres extends Applet {
public void init() {
Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
if (dim.width==640 && dim.height==480) {
try {
getAppletContext().showDocument
(new URL(getCodeBase()+"lowres.html"),"_top");
}
catch (Exception ex) {}
}
else {
try {
getAppletContext().showDocument
(new URL(getCodeBase()+"hires.html"),"_top");
}
catch (Exception ex) {}
}
}
}
In the example below, you can type a new URL in a textfield, and press a button to go to that page.
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.net.*;
public class GotoURLButton extends Applet implements
ActionListener {
Button b;
TextField t;
public void init() {
t = new TextField(20);
add(t);
b = new Button("Go to this URL");
add(b);
b.addActionListener(this);
}
public void actionPerformed(ActionEvent ae) {
if (ae.getSource() == b) {
try {
getAppletContext().showDocument(new URL(t.getText()));
}
catch (Exception e) {
e.printStackTrace();
}
}
}
}
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