I'm trying to build a simple Android app that increments a number displayed every time a button is pressed, but I can't work out how to fix the "illegal start of expression" error I keep getting.

My code:

package com.clicker;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;


public class Clicker extends Activity
{
    private int clickerNumber = 0;
    private TextView clickerText;
    private Button clickerButton;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        clickerText = (TextView)findViewById(R.id.clickerText);
        final Button clickerButton = (Button)findViewById(R.id.clickerButton);
             clickerButton.setOnClickListener(new View.OnClickListener());
                {
                 public void onClick();
                    {
                    clickerNumber = clickerNumber++;
                    clickerText.setText(Integer.toString(clickerNumber));
                    }
                }
    }
}

And compiler output:

compile:
[javac] Compiling 2 source files to /home/fraser/Applications/Android/Code/Clicker/bin/classes
[javac] /home/fraser/Applications/Android/Code/Clicker/src/com/clicker/Clicker.java:24: ')' expected
[javac]              clickerButton.setOnClickListener(new View.OnClickListener();
[javac]                                                                         ^
[javac] /home/fraser/Applications/Android/Code/Clicker/src/com/clicker/Clicker.java:26: illegal start of expression
[javac]                  public void onClick();
[javac]                  ^
[javac] /home/fraser/Applications/Android/Code/Clicker/src/com/clicker/Clicker.java:26: illegal start of expression
[javac]                  public void onClick();
[javac]                         ^
[javac] /home/fraser/Applications/Android/Code/Clicker/src/com/clicker/Clicker.java:26: ';' expected
[javac]                  public void onClick();
[javac]                                     ^
[javac] /home/fraser/Applications/Android/Code/Clicker/src/com/clicker/Clicker.java:29: ';' expected
[javac]                     clickerText.setText(Integer.toString(clickerNumber)));
[javac]                                                                         ^
[javac] 5 errors