Three versions of Java

Three versions of Java

• Write Once、Run Anywhere

• JavaSE: Standard Edition (desktop programs, console development ......)

• JavaME: Embedded Development (cell phones, small appliances ......)

• JavaEE: E Enterprise Development (Web terminal server development ......)

 

JDK、JRE、JVM

• JDK: Java developer tools, including JRE, JVM

• JRE: Java Runtime Environment

• JVM: Java Virtual Machine, there are two operating modes: "interpreted" and "compiled"