Question

Can you please fix the error.

package com.IST240Apps;

import java.awt.*;

import java.awt.event.*;

import java.io.*;

import javax.swing.*;

import java.net.*;

public class LinkRotator extends JFrame

implements Runnable, ActionListener {

String[] pageTitle = new String[5];

URI[] pageLink = new URI[5];

int current = 0;

Thread runner;

JLabel siteLabel = new Jlabel();

public LinkRotator() {

setDefaultCloseOperation(Jframe.EXIT_ON_CLOSE);

setSize(300, 100);

FlowLayout flo = new Flowlayout();

setLayout(flo);

add(siteLabel);

pageTitle = new String[] {

"Oracle Java Site",

"Server Side",

"JavaWorld",

"Google",

"Yahoo",

"Penn State"

};

pageLink[0] = getUR1("http://www.oracle.com/technetwork/java");

pageLink[1] = getUR1("http://www.theserverside.com");

pageLink[2] = getUR1("http://www.javaworld.com");

pageLink[3] = getUR1("http://www.google.com");

pageLink[4] = getUR1("http://yahoo.com");

pageLink[5] = getUR1("http://www.psu.edu");

Button visitButton = new Button("Visit Site");

visitButton.addActionListener(this);

add(visitButton);

setVisible(true);

start();

}

private URI getURI(String urlText) {

URI pageUR1 = null;

try {

pageURI = new URI(urlText);

} catch (URISyntaxException ex) {

// do nothing

}

return pageURI;

}

public void start() {

if (runner = null) {

runner = new Thread(this);

runner.start();

}

}

public void run() {

Thread thisThread = Thread.currentThread();

while (runner = thisThread) {

current++;

if (current > 5) {

current = 0;

}

siteLabel.setText(pageTitle[current]);

repaint();

try {

Thread.sleep(2000);

} catch (InterruptedException exc) {

// do nothing

}

}

}

public void actionPerformed(ActionEvent event) {

Desktop desktop = Desktop.getDesktop();

if (pageLink[current] != null) {

try {

desktop.browse(pageLink[current]);

runner = null;

System.exit(0);

} catch (IOException exc) {

// do nothing

}

}

}

public static viod main(String[] arguments) {

new LinkRotator();

}

}

Answer 1

Corrected Java Code is given below.

package com.IST240Apps; import java.awt.*; import java.awt.event.*; import java.io.*; import javax.swing.*; import java.net.*; import java.util.Objects; public class LinkRotator extends JFrame implements Runnable, ActionListener { String[] pageTitle = new String[5]; URI[] pageLink = new URI[6]; int current = 0; Thread runner; JLabel siteLabel = new JLabel(); public LinkRotator() { setDefaultCloseOperation(this.EXIT_ON_CLOSE); setSize(300, 100); FlowLayout flo = new FlowLayout(); setLayout(flo); add(siteLabel); pageTitle = new String[] { "Oracle Java Site", "Server Side", "JavaWorld", "Google", "Yahoo", "Penn State" }; pageLink[0] = getURI("http://www.oracle.com/technetwork/java"); pageLink[1] = getURI("http://www.theserverside.com"); pageLink[2] = getURI("http://www.javaworld.com"); pageLink[3] = getURI("http://www.google.com"); pageLink[4] = getURI("http://yahoo.com"); pageLink[5] = getURI("http://www.psu.edu"); Button visitButton = new Button("Visit Site"); visitButton.addActionListener(this); add(visitButton); setVisible(true); start(); } private URI getURI(String urlText) { URI pageUR1 = null; try { pageUR1 = new URI(urlText); } catch (URISyntaxException ex) { // do nothing } return pageUR1; } public void start() { if (Objects.equals(runner, null)) { runner = new Thread(this); runner.start(); } } public void run() { Thread thisThread = Thread.currentThread(); while (runner == thisThread) { current++; if (current > 5) { current = 0; } siteLabel.setText(pageTitle[current]); repaint(); try { Thread.sleep(2000); } catch (InterruptedException exc) { // do nothing } } } public void actionPerformed(ActionEvent event) { Desktop desktop = Desktop.getDesktop(); if (pageLink[current] != null) { try { desktop.browse(pageLink[current]); runner = null; System.exit(0); } catch (IOException exc) { // do nothing } } } public static void main(String[] arguments) { new LinkRotator(); } }

OUTPUT

Server Side Visit Site

Penn State Visit Site

Oracle Java Site Visit Site