remove unneeeded fcn

Author: scivision

+stdlib/cpu_arch.m

@@ -1,12 +1,16 @@
 %% CPU_ARCH get the CPU architecture
 % optional: java
 
-function arch = cpu_arch()
+function a = cpu_arch()
 
 if NET.isNETSupported()
-  arch = string(System.Runtime.InteropServices.RuntimeInformation.OSArchitecture);
+  a = System.Runtime.InteropServices.RuntimeInformation.OSArchitecture;
 else
-  arch = javaSystemProperty("os.arch");
+  a = javaMethod("getProperty", "java.lang.System", "os.arch");
+end
+
+try  %#ok<*TRYNC>
+  a = string(a);
 end
 
 end

+stdlib/get_username.m

@@ -4,9 +4,13 @@
 function n = get_username()
 
 if NET.isNETSupported()
-  n = string(System.Environment.UserName);
+  n = System.Environment.UserName;
 else
-  n = javaSystemProperty("user.name");
+  n = javaMethod("getProperty", "java.lang.System", "user.name");
+end
+
+try  %#ok<*TRYNC>
+  n = string(n);
 end
 
 end

+stdlib/java_vendor.m

@@ -3,7 +3,11 @@
 
 function v = java_vendor()
 
-v = javaSystemProperty("java.vendor");
+v = javaMethod("getProperty", "java.lang.System", "java.vendor");
+
+try  %#ok<*TRYNC>
+  v = string(v);
+end
 
 end
 

+stdlib/java_version.m

@@ -10,8 +10,10 @@
 
 function v = java_version()
 
-v = javaSystemProperty("java.version");
+v = javaMethod("getProperty", "java.lang.System", "java.version");
 
+try  %#ok<*TRYNC>
+  v = string(v);
 end
 
 %!assert(!isempty(java_version()))

+stdlib/os_version.m

@@ -7,9 +7,12 @@
 
 function [os, version] = os_version()
 
-os = javaSystemProperty("os.name");
-version = javaSystemProperty("os.version");
+os = javaMethod("getProperty", "java.lang.System", "os.name");
+version = javaMethod("getProperty", "java.lang.System", "os.version");
 
+try  %#ok<*TRYNC>
+  os = string(os);
+  version = string(version);
 end
 
 %!test