interface implementation

[Ram Murthy]

interface Z {void m1();} // 1
class D implements Z {public final void m1() {}} // 2
class E implements Z {public synchronized void m1() {}} // 3
class G implements Z {public native void m1();} // 4

In the above code shouldn't line 4 give a compile time error. The class G is not declared abstract but the m1() method under it is not implemented fully(missing {}).
When I compiled it worked...not sure why ??

Thanks,
JP

[marc weber]

The "native" keyword indicates a non-Java implementation of a method, so no braces are required.

Native libraries are loaded via System.loadLibrary(), and must be available to the JVM at runtime.

[Enge Chall]

Note: Native methods should not have a body. You must have to follow the same above syntax, when calling C-functions.

[Sasikanth Malladi]

Ravi, I modified your code to add braces and compiled it:

interface Z {void m1();} // 1
class D implements Z {public final void m1() {}} // 2
class E implements Z {public synchronized void m1() {}} // 3
class G implements Z {public native void m1(){}} // 4

And the output is

javac nativ.java
nativ.java:4: native methods cannot have a body
class G implements Z {public native void m1(){};} // 4

Sashi

[Ram Murthy]

Thank you all...that explains.