向JAVA发送JSON对象,并从JAVA接收JSON对象到MATLAB
我正在使用MATLAB的javabuilder工具在MATLAB运行时环境中执行MATLAB本机代码 代码向JAVA发送JSON对象,并从JAVA接收JSON对象到MATLAB,java,matlab,matlab-compiler,javabuilders,Java,Matlab,Matlab Compiler,Javabuilders,我正在使用MATLAB的javabuilder工具在MATLAB运行时环境中执行MATLAB本机代码 代码 public String getCHINdex(String tsDataJSON){ MWCharArray number1 = null; Object[] result = null; Calibration calibration = null; try { number1 = new MWCharArray(tsDataJSON) ; //
public String getCHINdex(String tsDataJSON){
MWCharArray number1 = null;
Object[] result = null;
Calibration calibration = null;
try
{
number1 = new MWCharArray(tsDataJSON) ; // Array of Input to be sent to MATLAB Runtime
calibration = new Calibration();
result = calibration.calibrationAPI(1, number1);
}
catch (Exception e)
{
e.printStackTrace();
}
finally
{
MWArray.disposeArray(number1);
MWArray.disposeArray(result);
calibration.dispose();
}
if(result.length >= 1){
return result[0].toString();
}
return null;
}
例外情况
Exception in thread "main" java.lang.IllegalStateException: Attempt to use an MWArray that has been disposed
at com.mathworks.toolbox.javabuilder.NativeArray.get(NativeArray.java:122)
at com.mathworks.toolbox.javabuilder.internal.MWMCR.mxArrayToString(Native Method)
at com.mathworks.toolbox.javabuilder.internal.MWMCR.access$1600(MWMCR.java:31)
at com.mathworks.toolbox.javabuilder.internal.MWMCR$6.mxArrayToString(MWMCR.java:949)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.mathworks.toolbox.javabuilder.internal.MWMCR$5.invoke(MWMCR.java:769)
at com.sun.proxy.$Proxy0.mxArrayToString(Unknown Source)
at com.mathworks.toolbox.javabuilder.MWBuiltinArray.toString(MWBuiltinArray.java:180)
at com.mathworks.toolbox.javabuilder.MWCharArray.toString(MWCharArray.java:24)
at .CHIndexCalculation.getCHINdex(CHIndexCalculation.java:45)
at .CHIndexCalculation.main(CHIndexCalculation.java:15)
我不确定是什么导致了这个异常?当我第二次运行代码时就会发生这种情况。从这个错误中,我可以看出它与使用已处理的数组有关。但我不知道为什么会出现这种情况。我每次都创建一个新对象。我已经找到了它。我只需要在try中移动最后一个if块。我试图从已处理的数组中提取结果
public String getCHINdex(String tsDataJSON){
MWCharArray number1 = null;
Object[] result = null;
Calibration calibration = null;
try
{
number1 = new MWCharArray(tsDataJSON) ; // Array of Input to be sent to MATLAB Runtime
calibration = new Calibration();
result = calibration.calibrationAPI(1, number1);
if(result.length >= 1){
return result[0].toString();
}
}
catch (Exception e)
{
e.printStackTrace();
}
finally
{
MWArray.disposeArray(number1);
MWArray.disposeArray(result);
calibration.dispose();
}
return null;
}