classpath settings
classpath is nested element of "javac" and "junit" task. You can add "pathelement" and "path" in classpath:
javac settings for multiple src directories
option 1, multiple nested src tags:
option 2, multiple includes items:
option 2 is better, because if you use src dirs somewhere else, you can set "src/,common/,map/**" as a property, and reuse this property.