javac -target 1.3 hello.java

[Kumar Sushil]

Hi friends,
when we use a higher version, but want that our application run also on lower version of JDK also, then we use
c:\>javac -target 1.3 hello.java
here file name is hello.java and currently we are useing JDK1.5 and we want byte code of hello.java that is compatable to jdk1.3.
This command does not run on jdk1.5 but this run on jdk1.4.

I want to know that -target option command runs or not on jdk1.5.

please tell me

[Edisandro Bessa]

Hi johny,

Here is the command : javac -source 1.3 OldCode.java

You can face a compiler warning if you have in your code some variable named assert.

If you want to compile your code for version 1.4 the command is javac -source 1.4 OldCode.java

Using the 1.4 version you will get a compile error if your code has some variable called as assert

[vishnu hiranamayee]

assertion is added in java's 1.4 version then why will we get a complier error in 1.4.
please let me know.

[Bharat Roy]

There's a target option too but I guess thats for J2ME.

[Bharat Roy]

JDK 1.4 --- assert is NOT a keyword until you compile it against -source 1.4 option.

JDK 1.5 --- assert IS a keyword by default. If you want to use assert as a variable name (which you should not) compile it against -source 1.3 option. (It will show you warning though)

[Bharat Roy]

Originally posted by vishnu hiranamayee:
assertion is added in java's 1.4 version then why will we get a complier error in 1.4.
please let me know.

You will get compiler error ONLY if you are using assert as a variable name and also compiling the code against -source 1.4 option.

[Mark Spritzler]

Please refrain form duplicate posting the same question.

Also, this forum is for the SCJP exam. Your question is not something that appears on the exam. So I am moving this to Java In General (Beginner)

Thanks and good luck.

Mark