how to keep package explorer clean in eclipse code example

Example 1: java eclipse console clear

for (int i = 0; i < 50; ++i) System.out.println();

Example 2: how to make maven clean install faster in eclipse

mvn -T 1C clean install -nsu -DskipTests -pl '!m7,!m8,!m18,!m11,!m24'

-- T 1C is to tell user 1 thread per core and -DskipTests to skip tests