compile error

This is the error:

C:\Program Files\Apache Software Foundation\Tomcat 5.0\webapps\begjsp-ch07x\WEB-
INF\classes\com\wrox\physics>javac *.java
Light.java:3: com.wrox.physics.Light is not abstract and does not override abstract method setWaveLength(long) in com.wrox.physics.Wave
public class Light implements Particle, Wave {
       ^
1 error

Question: How can I correct this error?

Thank you.
Light.java
Particle.java
Wave.java
LVL 34
Mike EghtebasDatabase and Application DeveloperAsked:
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ioantonCommented:
The methods getWavelenght() and setWavelenght() do not match the ones declared in the Wave interface. The method names are case sensitive. (length vs. Length)

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Mike EghtebasDatabase and Application DeveloperAuthor Commented:
Thank you
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