Yes you can...
Programs that are specifically designed with Java require a Java runtime to work on a computer. (In the case of Java, the runtime is called "Java Virtual Machine".) If you have any such program, you need to have Java.
The java runtime environment can be downloaded from several websites. Among them are Oracle, Java, CNET, Softsonic, Eclipse, AfterDawn, Soft32, and OldApps.
Yes you can but for that you must have have a Java Runtime Environment installed in your computer. Also if you are talking about programming in java then you need to install a Java SDK which can help you in executing your java code and run it. (It also contains Java Runtime Environment).
You may have to install Java runtime support.
The Java Runtime Environment invokes main methods.
The general Java Runtime Environment allows a computer to run Java applets and compiled Java files.
java.lang.reflect package has the ability to analyze itself at runtime. This is called Java reflection.
Probably not, unless you run a virus written in Java.
JRE stands for Java Runtime Environment. JRE is the runtime set up that is required by the JVM to execute java programs. The JRE and JVM (Java Virtual Machine) come packaged along with the Java Development Kit (JDK) that we download and install from the suns website to install Java.
The Java Runtime Environment (JRE) converts the byte code to machine language.
Java is defined by a specification and consists of a programming language, a compiler, core libraries and a runtime (Java virtual machine) The Java runtime allows software developers to write program code in other languages than the Java programming language which still runs on the Java virtual machine. The Java platform is usually associated with the Java virtual machine and the Java core libraries.
You would not be able to run any Java programs until you reinstalled it.