Exception in generating dynamic report

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Java

Am trying to generate dynamic report in java but am getting exception

import net.sf.dynamicreports.report.builder.column.TextColumnBuilder;

am using this jar file to generate columns

Code:

TextColumnBuilder<Integer>    column1 = col.column("A", "field1", type.integerType());

TextColumnBuilder<Integer>    column2 = col.column("B", "field2", type.integerType());

Exception:

run:
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/lang3/Validate
    at net.sf.dynamicreports.report.builder.column.Columns.column(Columns.java:78)
    at net.sf.dynamicreports.report.builder.column.Columns.column(Columns.java:94)
    at net.sf.dynamicreports.report.builder.column.ColumnBuilders.column(ColumnBuilders.java:86)
    at javareport.JavaReport.build(JavaReport.java:22)
    at javareport.JavaReport.<init>(JavaReport.java:17)
    at javareport.JavaReport.main(JavaReport.java:75)
Java Result: 1