In java, string objects are immutable. Immutable simply means unmodifiable or unchangeable. 在Java中,String对象是不可变的。不可变仅仅意味着不可修改或不可改变。 Once string object is created its data or state can't be changed but a new string object is created. 一旦创建了string对象,它的数据或...
* explicit copy of {@code original} is needed, use of this constructor is * unnecessary since Strings are immutable. * * @param original * A {@code String} */publicString(String original){this.value=original.value;this.hash=original.hash;} 当然也可以通过char数组构造。 代码语言:javascript ...
In themain()function, we created two immutable stringsstr1,str2usingStringBuilderclass. Then we checked string is empty or not using theisEmpty()methodthen printed the appropriate message on the console screen. Scala String Programs »
Multiple strings can share the same char[] because strings are immutable. The substring(int) method always returns a string that shares the backing array of its source string. Generally this is an optimization: fewer character arrays need to be allocated, and less copying is necessary. But this...
Note that use of this constructor is * unnecessary since Strings are immutable. * 初始化新创建的String对象,时期表示空字符串序列。 * 注意:这个构造方法的用法是没必要的,因为字符串是不可变的 */ public String() { this.value = "".value; } 无参构造方法中是将一个空字符串的value值赋给当前...
* newly created string is a copy of the argument string. Unless an * explicit copy of {@codeoriginal} is needed, use of this constructor is * unnecessary since Strings are immutable. * *@paramoriginal * A {@codeString}*/通过传入一个字符串参数来构建一个String对象,换句话说,新创建的字符串...
ToImmutableHashSet<TSource>(IEnumerable<TSource>) 枚举序列并生成其内容的不可变哈希集。 ToImmutableHashSet<TSource>(IEnumerable<TSource>, IEqualityComparer<TSource>) 枚举序列,生成其内容的不可变哈希集,并为集类型使用指定的相等比较器。 ToImmutableList<TSource>(IEnumerable<TSource>) 枚举序列并生成...
Forexample: */ /* Strings are constant; their values can not be changed after they are created. Stringbuffers support mutable strings. Because String objects are immutable they can be shared. Forexample: */ 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. String 字符串是常量,其...
Strings are constant; their values cannot be changed after they are created. String buffers support mutable strings. Because String objects are immutable they can be shared. For example: String str = "abc"; is equivalent to: char data[] = {'a', 'b', 'c'}; String str = new String(...
Because any arbitrary subclass of NSString can become a String instance, there are no guarantees about representation or efficiency when a String instance is backed by NSString storage. Because NSString is immutable, it is just as though the storage was shared by a copy. The first in any ...