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.

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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.

The following code is an example DATA step that makes use of the Calculator class included in the samples.jar, which is available from the Downloads tab.

---

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.)

This sample demonstrates how to use the Java Object and the DATA Step Component Interface to implement a basic calculator.

Type:	Sample
Topic:	SAS Reference ==> Component Objects ==> Component Objects

Date Modified:	2009-02-12 13:31:04
Date Created:	2009-01-27 18:08:23

Operating System and Release Information

Product Family	Product	Host	SAS Release
			Starting	Ending
SAS System	SAS Foundation	z/OS	9.2 TS1M0
		Microsoft® Windows® for 64-Bit Itanium-based Systems	9.2 TS1M0
		Microsoft Windows Server 2003 Datacenter 64-bit Edition	9.2 TS1M0
		Microsoft Windows Server 2003 Enterprise 64-bit Edition	9.2 TS1M0
		Microsoft Windows XP 64-bit Edition	9.2 TS1M0
		Microsoft® Windows® for x64	9.2 TS1M0
		Microsoft Windows Server 2003 Datacenter Edition	9.2 TS1M0
		Microsoft Windows Server 2003 Enterprise Edition	9.2 TS1M0
		Microsoft Windows Server 2003 Standard Edition	9.2 TS1M0
		Microsoft Windows XP Professional	9.2 TS1M0
		Windows Vista	9.2 TS1M0
		64-bit Enabled AIX	9.2 TS1M0
		64-bit Enabled HP-UX	9.2 TS1M0
		64-bit Enabled Solaris	9.2 TS1M0
		HP-UX IPF	9.2 TS1M0
		Linux	9.2 TS1M0
		Linux for x64	9.2 TS1M0
		OpenVMS on HP Integrity	9.2 TS1M0
		Solaris for x64	9.2 TS1M0