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Overview

The DATA step Component Interface creates and manipulates component objects from within a DATA step program. One such object is the Javaobj, which provides a mechanism, similar to the Java Native Interface (JNI), for instantiating Java classes, and accessing fields and methods on the resultant objects.

Note: The DATA step Java object is production in SAS 9.2. It was preproduction in SAS 9.0 and 9.1.

This sample demonstrates how to use the Javaobj and the DATA step Component Interface to implement a basic calculator that can be called from your DATA Step code.

Run the Sample

1. Download the associated JAR file from the Downloads tab in this sample.

   Tip: The Downloads tab also includes a link to the Java code for Calculator class written for this sample.

2. Set the CLASSPATH environment variable to the location of the JAR file. For example, you might have saved the code to C:\JavaPgms\samples.jar. After the CLASSPATH is set, SAS Foundation will have access to any programs that are contained within the JAR file.

   Note: For instructions on how to set environment variables, see your operating system documentation.

3. Submit the code on the Full Code tab.

Additional Documentation

For more information, see Base SAS: The Java Object and the DATA Step Component Interface.

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These sample files and code examples are provided by SAS Institute Inc. "as is" without warranty of any kind, either express or implied, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. Recipients acknowledge and agree that SAS Institute shall not be liable for any damages whatsoever arising out of their use of this material. In addition, SAS Institute will provide no support for the materials contained herein.

data _null_;
  declare javaobj calculator("samples/calc/Calculator");

  put 'Demonstrating Basic operations';
  x = 5; y = 3;
  calculator.callStaticDoubleMethod("add",x,y,sum);
  put '  ' x '+ ' y '= ' sum;

  calculator.callStaticDoubleMethod("subtract",x,y,difference);
  put '  ' x '- ' y '= ' difference;

  calculator.callStaticDoubleMethod("multiply",x,y,product);
  put '  ' x '* ' y '= ' product;

  calculator.callStaticDoubleMethod("divide",x,y,quotient);
  put '  ' x '/ ' y '= ' quotient;
  put ;

  put 'Demonstrating Memory operations'; 
  calculator.callDoubleMethod("memoryRecall",memory);
  put '  Memory Recall: ' memory;

  calculator.callVoidMethod("memoryPlus",5);
  put '  Memory Plus (5)';

  calculator.callVoidMethod("memoryPlus",3);
  put '  Memory Plus (3)';

  calculator.callDoubleMethod("memoryRecall",memory);
  put '  Memory Recall: ' memory;

  calculator.callVoidMethod("memoryMinus",2);
  put '  Memory Minus (2)';

  calculator.callDoubleMethod("memoryRecall",memory);
  put '  Memory Recall: ' memory;

  calculator.callVoidMethod("memoryClear");
  put '  Memory Clear';

  calculator.callBooleanMethod("hasMemory",memflag);
  put '  Memory Stored (0=false, 1=true)? ' memflag;

  calculator.callDoubleMethod("memoryRecall",memory);
  put '  Memory Recall: ' memory;
run;

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These sample files and code examples are provided by SAS Institute Inc. "as is" without warranty of any kind, either express or implied, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. Recipients acknowledge and agree that SAS Institute shall not be liable for any damages whatsoever arising out of their use of this material. In addition, SAS Institute will provide no support for the materials contained herein.

Demonstrating Basic operations
  5 + 3 = 8
  5 - 3 = 2
  5 * 3 = 15
  5 / 3 = 1.6666666667

Demonstrating Memory operations
  Memory Recall: 0
  Memory Plus (5)
  Memory Plus (3)
  Memory Recall: 8
  Memory Minus (2)
  Memory Recall: 6
  Memory Clear
  Memory Stored (0=false, 1=true)? 0
  Memory Recall: 0

Download and extract samples.zip to the computer on which your SAS Foundation installation is executing.

(To see the Java code for the Calculator class, download the calculator.java file.)

Operating System and Release Information