Target different version of JRE

Question

I\'m testing Java on a Windows Surface Pro. The Surface Pro has Java 7 Update 55, but does not have the JDK installed.

I compiled a program on my MacBook fr

Answer 1

In the error message major.minor version 52. the number 52 here represents the java version with which the class is compiled for example

Java SE 9 = 53
Java SE 8 = 52
Java SE 7 = 51
Java SE 6.0 = 50
Java SE 5.0 = 49
JDK 1.4 = 48
JDK 1.3 = 47
JDK 1.2 = 46
JDK 1.1 = 45

so your installed JRE is at higher version than your target use -source with the version number to which you want to compile in your case:

javac -source 1.7 -target 1.7 HttpsTest.java SSLSocketFactoryEx.java

Answer 2

From the command line, change your call to:

javac -source 1.7 -target 1.7 HttpsTest.java SSLSocketFactoryEx.java

The documentation for javac (for JDK 8) is here.

The documentation for javac (for JDK 9) is here.

Note: In JDK 9, -target is replaced with --release.

Answer 3

If you are using eclipse you can set compiler compliance level in the project properties-> Java Compiler. So your code is compiled for the chosen Java version. See here: