Hello Raspberry Pi

Every Java application has a single instance of class java.lang.Runtime that allows the application to interface with the environment in which the application is running.

• long freeMemory()
  Returns the amount of free memory in the Java Virtual Machine.
• long maxMemory()
  Returns the maximum amount of memory that the Java virtual machine will attempt to use.
• long totalMemory()
  Returns the total amount of memory in the Java virtual machine.

public class testMem {
 
 public static void main(String[] args){
 System.out.println("helloraspberrypi.blogspot.com");
 
 //the total amount of memory in the Java virtual machine
 long totalMem = Runtime.getRuntime().totalMemory();
 //the maximum amount of memory that the Java virtual machine will attempt to use
 long maxMem = Runtime.getRuntime().maxMemory();
 //the amount of free memory in the Java Virtual Machine
 long freeMem = Runtime.getRuntime().freeMemory();
 
 System.out.println("totalMemory() - " + totalMem);
 System.out.println("maxMemory() - " + maxMem);
 System.out.println("freeMemory() - " + freeMem);
 
 }
 
}

Run on Raspberry Pi: