package cn.lion.test;public class PerformanceTest {      privatestatic final int SIZE =100000;   publicstatic abstract class Test{     privateString operation;     publicTest(String operation){       this.operation= operation;     }     publicabstract void test(List<String> list);     publicString getOperation(){       returnoperation;     }   }   //執(zhí)行迭代操作的匿名類   staticTest iterateTest = new Test("iterate"){     publicvoid test(List<String> list){       for(inti=0; i<10; i++){          Iterator<String>it = list.iterator();          while(it.hasNext()){            it.next();          }       }     }   };   //執(zhí)行隨機訪問的匿名類   staticTest getTest = new Test("get"){     publicvoid test(List<String> list){       for(inti=0; i<list.size(); i++){          for(intk=0; k<10; k++){            list.get(k);          }       }     }   };   //執(zhí)行插入的匿名類   staticTest insertTest = new Test("insert"){     publicvoid test(List<String> list){       ListIterator<String>it = list.listIterator(list.size()/2);       for(inti=0; i<SIZE; i++){          it.add("lion");       }     }   };   //執(zhí)行刪除的匿名類   staticTest removeTest = new Test("remove"){     publicvoid test(List<String> list){       ListIterator<String>it = list.listIterator();       while(it.hasNext()){          it.next();          it.remove();       }     }   };   staticpublic void testArray(List<String> list){     Test[]tests = {iterateTest, getTest};     test(tests,list);   }   staticpublic void testList(List<String> list){     Test[]tests = {insertTest, iterateTest, getTest, removeTest};     test(tests,list);   }   staticpublic void test(Test[] tests, List<String> list){     for(inti=0; i<tests.length; i++){       System.out.print(tests[i].getOperation()+ "操作：");       longt1 = System.currentTimeMillis();       tests[i].test(list);       longt2 = System.currentTimeMillis();       System.out.print(t2-t1+ "ms");       System.out.println();     }   }   publicstatic void main(String[] args){          List<String>list = null;     //測試數組的迭代和隨機訪問操作     System.out.println("------測試數組------");     String[]tstr = new String[SIZE];     Arrays.fill(tstr,"lion");     list= Arrays.asList(tstr);     testArray(list);          tstr= new String[SIZE/2];     Collection<String>coll = Arrays.asList(tstr);          //測試Vector     System.out.println("------測試Vector------");     list= new Vector<String>();     list.addAll(coll);     testList(list);          //測試LinkedList     System.out.println("------測試LinkedList------");     list= new LinkedList<String>();     list.addAll(coll);     testList(list);          //測試ArrayList     System.out.println("------測試Vector------");     list= new ArrayList<String>();     list.addAll(coll);     testList(list);   }}