java集合List知识总结

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List list = new ArrayList();
list.add(“a”);
list.add(“b”);
list.add(“c”);
list.add(“d”);
list.add(1, “e”);

//list.add(10,"f"); //java.lang.IndexOutOfBoundsExceptionObject o = list.get(0);System.out.println(o);list.remove(0);list.set(0,"gu");for (int i = 0; i < list.size(); i++) {    System.out.println(list.get(i));}

List list = new ArrayList();
list.add(new Student(“guyulei”,25));
list.add(new Student(“gu”,25));
list.add(new Student(“yulei”,25));
list.add(new Student(“lei”,25));
```
for (int i = 0; i < list.size(); i++) {    Student s = (Student)list.get(i);    System.out.println(s.getName()+"..."+s.getAge()); }
```
ListIterator lit = list.listIterator();
while (lit.hasNext()){
String str = (String)lit.next();
if (“world”.equals(str)) {
lit.add(“javaee”);
}
}
System.out.println(list);
while (lit.hasNext()){
String str =(String) lit.next();//Object
System.out.print(str);
}
System.out.println();
while (lit.hasPrevious()){
System.out.print(lit.previous());
}

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