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Top Forums Programming Not able to execute the method based on OS in JAVA Post 302326524 by smartgupta on Thursday 18th of June 2009 06:30:49 AM
Old 06-18-2009
Not able to execute the method based on OS in JAVA

Hi,

In my application,I want to find out the OS name and based on OS I want to do some specific operations.So I write some code based on it in JAVA but I am able to get the OS name but Not able to use the method specific to OS.I write a simple code to check it and found that it is not going to the if statement.code is as follow--

Quote:

public class OSnane {

public static void main(String[] args) {

String OsName=null;
OsName=System.getProperty("os.name");

System.out.println("OS name="+OsName);
if(OsName == "SunOS")
System.out.println("hello Sun");
else if(OsName == "Windows XP")
System.out.println("Hello Windows");
else if(OsName == "Linux")
System.out.println("Hello Linux");
else
System.out.println("No OS selected!!!");


}

}
and the Output is:

Quote:
OS name=SunOS
No OS selected!!!

So please tell me how can I Use methods based on OS.
Thanks in Advance ...
 

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STAPEX(3stap)															     STAPEX(3stap)

NAME
stapex - systemtap examples LANGUAGE BASICS
These examples give a feel for basic systemtap syntax and control structures. global odds, evens probe begin { # "no" and "ne" are local integers for (i=0; i<10; i++) { if (i % 2) odds [no++] = i else evens [ne++] = i } delete odds[2] delete evens[3] exit () } probe end { foreach (x+ in odds) { printf ("odds[%d] = %d0, x, odds[x]) } foreach (x in evens-) { printf ("evens[%d] = %d0, x, evens[x]) } } This prints: odds[1] = 1 odds[3] = 5 odds[4] = 7 odds[5] = 9 evens[5] = 8 evens[4] = 6 evens[2] = 2 evens[1] = 0 Note that all variables types are inferred, and that all locals and globals are automatically initialized. This script prints the primes between 0 and 49. function isprime (x) { if (x < 2) return 0 for (i=2; i<x; i++) { if (x % i == 0) return 0 if (i * i > x) break } return 1 } probe begin { for (i=0; i<50; i++) if (isprime (i)) printf("%d0, i) exit() } This script demonstrates recursive functions. function fibonacci(i) { if (i < 1) error ("bad number") if (i == 1) return 1 if (i == 2) return 2 return fibonacci (i-1) + fibonacci (i-2) } probe begin { printf ("11th fibonacci number: %d0, fibonacci(11)) exit () } Any larger number may exceed the MAXACTION or MAXNESTING limits, and result in an error. PROBING
To trace entry and exit from a function, use a pair of probes: probe kernel.function("sys_mkdir") { println ("enter") } probe kernel.function("sys_mkdir").return { println ("exit") } To list the probeable functions in the kernel, use the listings mode. % stap -l 'kernel.function("*")' To list the probeable functions and local variables in the kernel, use another listings mode. % stap -L 'kernel.function("*")' MORE EXAMPLES
The directory to find more examples can be found in the stappaths(7) manual page. SEE ALSO
stap(1) stapprobes(3stap) stapfuncs(3stap) stappaths(7) STAPEX(3stap)
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