How do I create a instance for Constructor?

I cannot create object for this coding. How can I access this values I want to return the msg value in this coding?

package com.my;

import org.apache.log4j.Level;
import org.apache.log4j.Logger;
import org.apache.log4j.VectorAppender;
import org.apache.log4j.spi.LoggingEvent;
import java.util.Vector;
public class LogCapture 
    {
    private final VectorAppender appender;
    private final Level level;
    public LogCapture(final Level level)
        {
        this.level = level;
        Logger root = Logger.getRootLogger();
        appender = new VectorAppender();
        root.addAppender(appender);
        }
public static void main(String args[])
{
    new LogCapture(Level.INFO);

    LogCapture.getMessage() ;
}
    public String getMessage()
        {
        Vector vector = appender.getVector();
        String msg = null;
        switch (vector.size())
            {
        case 0:
            break;
        case 1:
            LoggingEvent event = (LoggingEvent) vector.elementAt(0);
            msg = event.getRendere开发者_StackOverflow中文版dMessage();
            break;
        }
        return msg;
    }
}

I'm not sure that I understand the question, but it sounds easy. You create an instance like this:

new LogCapture(Level.INFO);

You can find the other log levels here: Documentation for Level

Edit (since the OP has added some more code): Change the code in the main method so that it says

LogCapture logCapture = new LogCapture(Level.INFO);
logCapture.getMessage();