unreported IOException problem

hi,

i am trying to call one method from different file but getting this error..

Quote:

---

callMethod.java:31: unreported exception java.io.IOException; must be caught or declared to be thrown

---

i already reported this exception in that method but cant understand where else need to report ?

Code:

---

public class callMethod extends JFrame implements ActionListener {
JButton button;

callMethod(){
button=new JButton("show");  button.addActionListener(this);

add(button);
}


public static void main(String[] args) throws IOException  {
                callMethod cm=new callMethod();
                cm.setSize(200,100);
                cm.setVisible(true);
                }


public void actionPerformed (ActionEvent e) {
if (e.getSource()==button) {

MyFile file=new MyFile();
String[][] show=file.method("get", "20"); //error mentioned in this line
..
..
}
}

---

the method of MyFile:

Code:

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public String[][] method(String name, String value) throws IOException {
...
..

---

i can run it from MyFile but cant call from different file...

pls help me...

Code:

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public void actionPerformed (ActionEvent e)

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cannot throw an IOException. Even if you add is as

Code:

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public void actionPerformed (ActionEvent e)  throws IOException

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it will complain (although differently).

do this:

Code:

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public void actionPerformed (ActionEvent e)  {
  try {
    // execute IOException-throwing stuff
  } catch (IOException ex) {
    // do something with it: ex.printStackTrace(), or throw a runtime exception, or simply ignore it.
  }
}

---

Quote:

---

Originally Posted by doha786

Code:

---

public void actionPerformed (ActionEvent e) {
  if (e.getSource()==button) {

      MyFile file=new MyFile();
      String[][] show=file.method("get", "20"); //error mentioned in this line
      ..
      ..
  }
}

---

---

the method, "method" throws the exception but your actionPerformed method calls this method and doesn't do anything with the exception. I recommend you do what the error is in essence telling you to do: put the method call in the actionPerformed in a try/catch block.

Code:

---

public void actionPerformed (ActionEvent e) {
  if (e.getSource()==button) {

      MyFile file=new MyFile();
      try {
        String[][] show=file.method("get", "20");
      }
      catch (IOException ioe) {
        ioe.printStackTrace();  // or whatever else may need to be done if file not found
      }
     
      ..
      ..
  }
}

---

great great thanks........


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