Interface Expected Here Error

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No Interface Expected Here Java

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No Interface Expected Here Android Studio

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Android Interface Expected Here

takes a minute: Sign up Why is my program saying there is an error: “interface expected here”? up vote 1 down vote favorite Whenever I type this code, java always underlines the class declaration sentence and the error message is "interface expected here". How can I fix this? package tempconverter; import javax.swing.*; import java.awt.event.*; import java.awt.FlowLayout; import static java.lang.System.out; public interface expected here error android class TempConverter extends JFrame implements ActionListener, ActionEvent{ static JFrame f = new JFrame(); static JTextField enter = new JTextField(3); static JButton confirm = new JButton("Convert"); public static void main(String[] args) { f.setLayout(new FlowLayout()); f.setSize(100, 50); f.pack(); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.add(enter); f.add(confirm); f.setVisible(true); } @Override public void actionPerformed (ActionEvent e) { double toConvert = Float.parseFloat(enter.getText()); double inF, inK; inF = toConvert / 5 * 9 + 32; inK = toConvert + 273; out.println("In degrees Fahrenheit, " + toConvert + "degrees Celsius would be " + inF + "degrees."); out.println("In degrees Kelvin, " + toConvert + "degrees Celsius would be " + inK + "degrees."); } } java share|improve this question edited Aug 10 '14 at 8:39 AlexR 82.3k367127 asked Aug 10 '14 at 8:38 TessellatingPi 113 add a comment| 3 Answers 3 active oldest votes up vote 1 down vote As per the Java Documentation, ActionEvent is a class. You can only implement interfaces, hence the very clear error message. What I think you meant.. Normally, when I want to implement some custom ActionListener, I take a similar approach: public class MyAction

Certification Databases Caching Books Engineering Languages Frameworks Products This Site Careers Other all forums Forum: Beginning Java error: no interface expected here Peter Simon Greenhorn Posts: 14 posted 13 years ago Hi, I have two classes which extend interfaces. no interface expected here intellij One extends Serializable, the other javax.ejb.EntityBean I do import the right packages. java.io.Serializable and javax.ejb.* no interface expected here serializable Compiler complains: no interface expected here. I guess the solution is pretty straightforward, but I don't see what I'm doing wrong. thanks for java implements setting this straight. Barry Gaunt Ranch Hand Posts: 7729 posted 13 years ago Sorry to be a pedant but do you really mean extends Serializable? -Barry Ask a Meaningful Question and HowToAskQuestionsOnJavaRanch Getting someone to think and http://stackoverflow.com/questions/25226931/why-is-my-program-saying-there-is-an-error-interface-expected-here try something out is much more useful than just telling them the answer. Volodymyr Shram Ranch Hand Posts: 47 posted 13 years ago Originally posted by Peter Simon: Hi, I have two classes which extend interfaces. One extends Serializable, the other javax.ejb.EntityBean I do import the right packages. java.io.Serializable and javax.ejb.* Compiler complains: no interface expected here. I guess the solution is pretty straightforward, but I don't see what I'm doing wrong. thanks for setting this https://coderanch.com/t/392710/java/java/error-interface-expected straight. Yeah, Barry Gaunt is right, you have to use implement instead of extends interfaces in your case: public abstract class YourBean implements EntityBean or extends inteface for local/remote interface: public interface GateLocal extends javax.ejb.EJBLocalObject and implement your serializable object: public class YourModel implements Serializable ... Peter Simon Greenhorn Posts: 14 posted 13 years ago thank you for the replys. As I thought it was pretty straightforward. Have to get used interpreting the errormessages I guess. Barry Gaunt Ranch Hand Posts: 7729 posted 13 years ago Volodymyr got in before me ( while I had to go for my books ) You must implement EntityBean. Damm... I'll just have to learn to type with four fingers... [ October 25, 2002: Message edited by: Barry Gaunt ] Ask a Meaningful Question and HowToAskQuestionsOnJavaRanch Getting someone to think and try something out is much more useful than just telling them the answer. Volodymyr Shram Ranch Hand Posts: 47 posted 13 years ago Originally posted by Barry Gaunt: Volodymyr got in before me ( while I had to go for my books ) Peter Simon Greenhorn Posts: 14 posted 13 years ago Ok, I think I got it. Barry is fast, but Volodymyr is even faster. Thanks for helping me out guys. Peter Simon Greenhorn Posts: 14 posted 13 years ago Barry and Volodymyr, May

Reply 6 Replies - 10135 Views - Last Post: 26 October 2009 - 07:56 http://www.dreamincode.net/forums/topic/134484-error-interface-expected-here/ AM Rate Topic: #1 nakan New D.I.C Head Reputation: 0 Posts: 9 Joined: 09-September 09 error "interface expected here" Posted 26 October 2009 - 07:34 AM Can any enlighten me how to fix this problem? import model.*; import java.awt. *; import java.text.*; import javax.swing.*; import javax.swing.table.TableColumn; interface expected import javax.swing.text.View; public class SpreadSheet extends JPanel implements View { private JLabel cellID = new JLabel(); private JLabel bunkNo = new JLabel(); private JLabel prisoner = new JLabel(); private JLabel crime = new JLabel(); private JLabel start = new JLabel(); private JLabel end = new JLabel(); private JButton interface expected here next = new JButton("Bext bunk"); private Prison prison; private String[] cells = new String[20]; public SpreadSheet() { setup(); build(); update(); } private void setup() {} private void build() { //String[] title = {"A", "B", "C"}; String[][] rows = { {"1.1", null, null}, {"1.2", null, null}, {"1.3", null, null}, {"1.4", null, null}, {"1.5", null, null}, {"1.6", null, null}, {"1.7", null, null}, {"1.8", null, null}, {"1.9", null, null}, {"1.10", null, null}, {"2.1", null, null}, {"2.2", null, null}, {"2.3", null, null}, {"2.4", null, null}, {"2.5", null, null}, {"2.6", null, null}, {"2.7", null, null}, {"2.8", null, null}, {"2.9", null, null}, {"2.10", null, null} }; JTable table = new JTable(rows, title); table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); TableColumn column = null; column = table.getColumnModel().getColumn(0); column.setPreferredWidth(20); column = table.getColumnModel().getColumn(1); column.setPreferredWidth(91); column = table.getColumnModel().getColumn(2); column.setPreferredWidth(91); JScrollPane scrollPane = new JScrollPane(table); scrollPane.setPreferredSize(new Dimension(220, 150)); add(scrollPane); update(); } public void update() {} private class Listener impleme