java中常用的包、类、以及包中常用的类、方法、属性
常用的包 | java.io.*; java.util.*; java.lang.*; java.math.*; java.sql.*; java.text.*; java.awt.*; javax.swing.*; |
包名 | 接口 | 类 | 方法 | 属性 |
java.util.*; | public interface Collection<E> extends Iterable<E> Collection 层次结构 中的根接口。
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| public interface Iterator<E> 迭代器 |
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| public interface List<E> extends Collection<E>
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| public interface Map<K,V>
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| public interface Set<E> extends Collection<E>
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| public class ArrayList<E> extends AbstractList<E> implements List<E>, RandomAccess, Cloneable, Serializable
| 通过继承关系和实现,父类有的,它都有。 |
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| public class Date extends Object implements Serializable, Cloneable, Comparable<Date> 时间类 |
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| 1.public class HashMap<K,V> extends AbstractMap<K,V> implements Map<K,V>, Cloneable, Serializable
2.public class HashSet<E> extends AbstractSet<E> implements Set<E>, Cloneable, Serializable 3. public class Hashtable<K,V> extends Dictionary<K,V> implements Map<K,V>, Cloneable, Serializable
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| public final class UUID extends Object implements Serializable, Comparable<UUID> 表示通用唯一标识符 (UUID) 的类。 |
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boolean | add(E e) |
boolean | addAll(Collection<? extends E> c) |
void | clear() |
boolean | contains(Object o) |
boolean | containsAll(Collection<?> c) |
boolean | equals(Object o) |
int | hashCode() |
boolean | isEmpty() |
Iterator<E> | iterator() |
boolean | remove(Object o) |
boolean | removeAll(Collection<?> c) |
boolean | retainAll(Collection<?> c) |
int | size() |
Object[] | toArray() |