今天的题目是String.StringBuffer和StringBuilder的区别: 首先还是去官方的API看看对这三种类型的介绍吧,Go...... 一.继承类和实现接口情况 1.String类 public final class String extends Object implements Serializable, Comparable<String>, CharSequence 2.StringBuffer类 public final class StringBuffer ex…
目录: 1.String类的不可变性 2.用String的时候需要注意什么 3.String与StringBuilder的区别 4.StringBuilder和StringBuffer的区别 String类的不可变性: 这个不可变性需要看源码,String类中有几个成员变量: private final char[] value;//存放String的值 private final int offset; private final int count; 他们都是final类型的,当你创建一个S…
1 String String:字符串常量,字符串长度不可变.Java中String是immutable(不可变)的. String类的包含如下定义: /** The value is used for character storage. */ private final char value[]; /** The offset is the first index of the storage that is used. */ private final int offset; /** Th…
1.String 2.Stringbuffer 3.StringBuilder 4.三者之间的区别 5.使用策略 1.String public final class String implements java.io.Serializable, Comparable<String>, CharSequence { /** The value is used for character storage. */ private final char value[]; } 首先String是fi…
1 String String:字符串常量,字符串长度不可变.Java中String是immutable(不可变)的. String类的包含如下定义: /** The value is used for character storage. */ private final char value[]; /** The offset is the first index of the storage that is used. */ private final int offset; /** Th…
