BeUndead questions

BeUndead answers

• How to .indexOf on two chars?
• Why doesn't my assert doesn't work in IntelliJ?
• When working with immutable objects, how best do you return a copy with modified field(s)?
• Dynamically invoke the correct implementation in a factory
• Java - How to print() output to previous line after input
• Printing a java map Map<String, Object> - How? [duplicate]