simplify java internals

Author: scivision

+stdlib/private/javaFileObject.m

@@ -1,14 +1,10 @@
 %% JAVAFILEOBJECT Return a Java File object for a given file path.
 function o = javaFileObject(p)
 
-try
-    o = java.io.File(p);
-catch e
-  if strcmp(e.identifier, "Octave:undefined-function")
-    o = javaObject("java.io.File", p);
-  else
-    rethrow(e);
-  end
+if stdlib.isoctave()
+  o = javaObject("java.io.File", p);
+else
+  o = java.io.File(p);
 end
 
 end

+stdlib/private/javaLinkOption.m

@@ -1,11 +1,9 @@
 function o = javaLinkOption()
 
-try
+if stdlib.isoctave()
+  o = javaMethod("values", "java.nio.file.LinkOption");
+else
   o = java.nio.file.LinkOption.values;
-catch e
-  if strcmp(e.identifier, "Octave:undefined-function")
-    o = javaMethod("values", "java.nio.file.LinkOption");
-  else
-    rethrow(e);
-  end
+end
+
 end

+stdlib/private/javaOSBean.m

@@ -1,13 +1,9 @@
 function b = javaOSBean()
 
-try
+if stdlib.isoctave()
+  b = javaMethod("getOperatingSystemMXBean", "java.lang.management.ManagementFactory");
+else
   b = java.lang.management.ManagementFactory.getOperatingSystemMXBean();
-catch e
-  if strcmp(e.identifier, "Octave:undefined-function")
-    b = javaMethod("getOperatingSystemMXBean", "java.lang.management.ManagementFactory");
-  else
-    rethrow(e);
-  end
 end
 
 end

+stdlib/private/javaPathObject.m

@@ -1,15 +1,11 @@
 %% JAVAPATHOBJECT Return a Java nio.file.Path object for a given file path.
 function o = javaPathObject(p)
 
-try
+if stdlib.isoctave()
+  o = javaFileObject(p).toPath();
+else
   o = java.nio.file.Paths.get(p, javaArray('java.lang.String', 0));
   % o = javaFileObject(p).toPath();  % above way about 20% faster
-catch e
-  if strcmp(e.identifier, "Octave:undefined-function")
-    o = javaFileObject(p).toPath();
-  else
-    rethrow(e);
-  end
 end
 
 end

+stdlib/private/javaSystemProperty.m

@@ -1,11 +1,9 @@
 function p = javaSystemProperty(k)
 
-try
+if stdlib.isoctave()
+  p = javaMethod("getProperty", "java.lang.System", k);
+else
   p = string(java.lang.System.getProperty(k));
-catch e
-  if strcmp(e.identifier, "Octave:undefined-function")
-    p = javaMethod("getProperty", "java.lang.System", k);
-  else
-    rethrow(e);
-  end
+end
+
 end