Java 将字符串插入ArrayList
我创建了两种方法将泛型数据插入ArrayList:Java 将字符串插入ArrayList,java,sorting,indexing,junit,Java,Sorting,Indexing,Junit,我创建了两种方法将泛型数据插入ArrayList: public void add(T element) throws SortingException{ if(element == null) throw new SortingException("addElement: element can't be null"); int index = getIndexInsert(element); (this.array).add(index, elemen
public void add(T element) throws SortingException{
if(element == null)
throw new SortingException("addElement: element can't be null");
int index = getIndexInsert(element);
(this.array).add(index, element);
}
private int getIndexInsert(T element){
int index = 0;
boolean cont = true;
T currEl = null;
while((index<(this.array).size())&&cont){
currEl = (this.array).get(index);
if((this.comparator).compare(element, currEl)<0)
cont = false;
else index++;
}//while
return index;
}
这是我的测试方法:
@Test
public void testStringOrder() throws SortingException {
String[] arrExpected = {"ciao","come","stai"};
String[] arrActual = new String[3];
arrayString.add("come");
arrayString.add("ciao");
arrayString.add("stai");
arrayString=arrayString.insertionSort(0);
for(int i=0;i<3;i++) {
/*DEBUG:*/ System.out.println(arrayString.get(i));
arrActual[i] = arrayString.get(i);
}
assertArrayEquals(arrExpected,arrActual);
}
@测试
public void testStringOrder()引发排序异常{
字符串[]arexpected={“ciao”,“come”,“stai”};
字符串[]数组=新字符串[3];
arrayString.add(“come”);
排列。添加(“ciao”);
排列。添加(“stai”);
arrayString=arrayString.insertionSort(0);
对于(int i=0;我能告诉我们arrayString
是在哪里初始化的吗?我添加了那个部分。在createArrayOfString()
方法上,你可能还需要@之前。哦,天哪,谢谢,我完全忘了它。现在它工作了!
@Test
public void testStringOrder() throws SortingException {
String[] arrExpected = {"ciao","come","stai"};
String[] arrActual = new String[3];
arrayString.add("come");
arrayString.add("ciao");
arrayString.add("stai");
arrayString=arrayString.insertionSort(0);
for(int i=0;i<3;i++) {
/*DEBUG:*/ System.out.println(arrayString.get(i));
arrActual[i] = arrayString.get(i);
}
assertArrayEquals(arrExpected,arrActual);
}
private Sorting<Integer> arrayInteger;
private Sorting<String> arrayString;
@Before
public void createArrayOfInteger(){
arrayInteger = new Sorting<>(new IntegerComparator());
}
public void createArrayOfString(){
arrayString = new Sorting<>(new StringComparator());
}