How I can apply these principles in my Java code in eclipse I need a practical example, please for any one of these

Design Principles Isolation Least Privilege Compartmentalization Separation of duties Component's integration - Open design Simplicity of Design Abstraction Generic design Complete Mediation Defense-In-depth Design Access control pattern and System security levels Fail safe default and fail secure Least Astonishment (Psychological Acceptability) Minimize trust surface (Reluctance to trust) Usability