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单选题
关于String,StringBuilder以及StringBuffer,描述错误的是()。
A
对String对象的任何改变都不影响到原对象,相关的任何change操作都会生成新的对象
B
StringBuffer是线程安全
C
StringBuilder是线程安全
D
可以修改StringBuilder和StringBuffer的内容
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考题
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考题
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考题
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考题
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考题
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This code is NOT thread-safe.B
The programmer can replace StringBuffer with StringBuilder with no other changes.C
This code will perform well and converting the code to use StringBuilder will not enhance the performance.D
This code will perform poorly. For better performance, the code should be rewritten: return ““+ this.name + “”;
考题
单选题关于 String、StringBuffer 和 StringBuilder 说法错误的是()A
String 创建的字符串是不可变的B
StringBuffer 创建的字符串是可变的,而所引用的地址一直不变C
StringBuffer 是线程安全的,因此性能比 StringBuilder 好D
StringBuilder 没有实现线程安全,因此性能比 StringBuffer 好
考题
问答题String/StringBuilder的异同
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