Category Archives: Java

change jdk 6 to 7

sudo rm /usr/lib/jvm/default-java sudo ln -s java-1.7.0-openjdk-i386 /usr/lib/jvm/default-java

download java 6

https://www.oracle.com/technetwork/java/javase/java-archive-downloads-javase6-419409.html

joda time

String dateString = “2018-08-29T00:00:00+07:00”; String pattern = “yyyy-MM-dd’T’HH:mm:ssZ”; DateTimeFormatter dtf = DateTimeFormat.forPattern(pattern); DateTime dateTime = dtf.parseDateTime(dateString); System.out.println(dateTime);

Intellij plugin project Lombok

Go to File > Settings > Plugins Click on Browse repositories… Search for Lombok Plugin Click on Install plugin Restart IntelliJ IDEA

increase memory tomcat

tomcat8 : sudo vi /etc/default/tomcat8 edit bagian JAVA_OPTS, rubah value -Xmx contoh -Xmx128m atau -Xmx16g tomcat6 : sudo vi /usr/share/tomcat6/bin/setenv.sh export JAVA_OPTS=”-Xmx2048m” atau bisa ditambahakan minimalnya export JAVA_OPTS=”-Xmn1024m -Xmx2048m”

apt-cache check alternative versi tomcat

apt-cache policy tomcat6 tomcat6: Installed: 6.0.35-1ubuntu3 Candidate: 6.0.35-1ubuntu3.11 Version table: 6.0.35-1ubuntu3.11 0 500 http://mirror.unpad.ac.id/ubuntu/ precise-updates/main amd64 Packages 500 http://mirror.unpad.ac.id/ubuntu/ precise-security/main amd64 Packages 500 http://security.ubuntu.com/ubuntu/ precise-security/main amd64 Packages *** 6.0.35-1ubuntu3 0 500 http://mirror.unpad.ac.id/ubuntu/ precise/main amd64 Packages 100 /var/lib/dpkg/status

install java dan memilih versi java

copy jre-6u45-linux-x64.bin chmod +x jre-6u45-linux-x64.bin ./jre-6u45-linux-x64.bin mv jre1.6.0_45/ java-6-oracle/ mv java-6-oracle/ /usr/lib/jvm/ cd /usr/lib/jvm/ sudo update-alternatives –install “/usr/bin/java” “java” “/usr/lib/jvm/java-6-oracle/bin/java” 1 sudo update-alternatives –install “/usr/bin/javac” “javac” “/usr/lib/jvm/java-6-oracle/bin/javac” 1 sudo update-alternatives –install “/usr/bin/javaws” “javaws” “/usr/lib/jvm/java-6-oracle/bin/javaws” 1 sudo update-alternatives –config java java -version

check versi tomcat

java -cp /usr/share/tomcat6/lib/catalina.jar org.apache.catalina.util.ServerInfo Server version: Apache Tomcat/6.0.35 Server built: Feb 17 2017 02:24:45 Server number: 6.0.35.0 OS Name: Linux OS Version: 3.13.0-117-generic Architecture: amd64 JVM Version: 1.6.0_41-b41 JVM Vendor: Sun Microsystems Inc.