/** * $Header: /tools/PerfLab/src/PerfLab/StringTest.java 4 5/31/01 4:07p Kkirkham $ * $History: StringTest.java $ * * ***************** Version 4 ***************** * User: Kkirkham Date: 5/31/01 Time: 4:07p * Updated in $/tools/PerfLab/src/PerfLab * Experimentation * * ***************** Version 3 ***************** * User: Kkirkham Date: 5/31/01 Time: 1:45p * Updated in $/tools/PerfLab/src/PerfLab * Experimentation * * ***************** Version 2 ***************** * User: Kkirkham Date: 4/30/01 Time: 12:41p * Updated in $/tools/PerfLab/src/PerfLab * Standardize * */ package PerfLab; // import appropriate package import PerfLab.*; /** * Title: String Test

* Description: Test of String performance

* Copyright: Copyright (c) Kurt Kirkham

* Company: Sallie Mae

* @author Kurt Kirkham * @version 1.0 */ public class StringTest { // Performance Lab reference, one for Strings and Two for String Buffers protected PerformanceLab m_objStrings = new PerformanceLab("String Concatination"); protected PerformanceLab m_objStringBuffers = new PerformanceLab("String Buffer Concatination Test 1"); protected PerformanceLab m_objStringBuffers2 = new PerformanceLab("String Buffer Concatination Test 2"); public StringTest(int p_nNumberOfTimes) { // ** STRING PORTION ** // Get Timings for Strings m_objStrings.setStartTime(); // Setup the variables String strConcat = new String(); // Loop through adding up the concatinations for (int i=0; i < p_nNumberOfTimes; i++) { strConcat += "X"; } // Get End Timing m_objStrings.setEndTime(); // ** STRING BUFFER PORTION Test 1** // Get Timings for Strings m_objStringBuffers.setStartTime(); // Setup the variables StringBuffer strbufConcat = new StringBuffer(); // Loop through adding up the concatinations for (int i=0; i < p_nNumberOfTimes; i++) { strbufConcat.append("X"); } // Move String Buffer to String strConcat = strbufConcat.toString(); // Get End Timing m_objStringBuffers.setEndTime(); // ** STRING BUFFER PORTION Test 2** // Get Timings for Strings m_objStringBuffers2.setStartTime(); // Setup the variables StringBuffer strbufConcat2 = new StringBuffer(p_nNumberOfTimes); // Loop through adding up the concatinations for (int i=0; i < p_nNumberOfTimes; i++) { strbufConcat2.append("X"); } // Move String Buffer to String strConcat = strbufConcat2.toString(); // Get End Timing m_objStringBuffers2.setEndTime(); // Show Differences m_objStrings.calculateTimeDifference(); m_objStringBuffers.calculateTimeDifference(); m_objStringBuffers2.calculateTimeDifference(); // Compare Test Results PerformanceLab.compareTests(m_objStrings,m_objStringBuffers); PerformanceLab.compareTests(m_objStrings,m_objStringBuffers2); PerformanceLab.compareTests(m_objStringBuffers,m_objStringBuffers2); } public static void main(String[] args) { StringTest objStringtest = new StringTest(25000); } }