# 01-default-value-placeholders  (Spring Boot 4.1.2, JDK 25)
no demo.* properties set:      zone = ${demo.region:eu}-primary   plain = static-value
demo.region=ap:                zone = ${demo.region:eu}-primary
int property, placeholder default: context FAILED to start
root cause: java.lang.NumberFormatException
            For input string: "${demoport.number:8080}"