关于StringBuffer和StringBuilder说法正确的是( )
相似题目
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Which two scenarios are NOT safe to replace a StringBuffer object with a StringBuilder object?()
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Whichtwo scenarios are NOT safe to replace a StringBuffer object with a StringBuilder object?()
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以下语句的含义是() char[] arrcrlf={13,10}; String crlf=new String(arrcrlf); stringBuffer dest = new StringBuffer("西行漫记"); dest.append(crlf);
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Which methods from the String and StringBuffer classes modify the object on which they are called?()
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Which two scenarios are NOT safe to replace a StringBuffer object with a StringBuilder object?()
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Given this method in a class: public String toString() { StringBuffer buffer = new StringBuffer(); buffer.append(‟<‟); buffer.append(this.name); buffer.append(‟>‟); return buffer.toString(); } Which is true?()
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下列关于String类和stringBuffer类说法正确的有()。
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字符串的append函数可以添加多种内容,以下append函数的使用中,错误的是() StringBuffer strb1 = new StringBuffer(); Integer intObj = new Integer(33);
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以下说法错误的是( )A. StringBuffer s = new StringBuffer();创建一个空的对象SB. StringBuffer类都被声明为非final类型C. StringBuffer类是字符串缓冲区类,用于创建长度不可变的字符串对象D. StringBuffe线程安全的可变字符序列
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StringBuffer和String属于不同的类型,不能直接进行强制类型转换( )
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测试如下代码:public class Ref{public static void main(String[] args) {StringBuffer sbl = new StringBuffer(Hello);StringBuffer sb2 = new StringBuffer(Hello);boolean result = sbl.equals(sb2);System.out.println(result);}}下述哪条语句正确描述了程序编译和运行的行为?
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以下对StringBuffer类的描述不正确的是:( )(多选)A.StringBuffer()初始容量为32个字符串缓冲区B. StringBuffer类用于处理“可变”字符串C.StringBuffer类可以被继承D. StringBuffer通常情况下一般使用构造方法进行初始化
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关于StringBuffer 相关方法描述正确的是:( )
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StringBuffer字符串缓冲区的初始容量是多少个字符( )
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StringBuffer类似一个字符容器,当在其中添加或删除字符时,并不会产生新的StringBuffer对象。( )
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测试如下代码: public class Ref{ public static void main(String[] args) { StringBuffer sbl = new StringBuffer(\Hello\); StringBuffer sb2 = new StringBuffer(\Hello\); boolean result = sbl.equals(sb2); System.out.println(result); } } 下述哪条语句正确描述了程序编译和运行的行为?
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处理字符串运行速度快慢为:StringBuilder > StringBuffer > String ( )
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String、StringBuffer、StringBuilder的区别?
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先阅读下面的程序片段:String str1=new String(\java\);String str2=new String(\java\);StringBuffer str3=new StringBuffer(\java\);对于上述定义的变量,以下表达式的值为true的是哪个?( )
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Sring和StringBuffer是属于()包的
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StringBuffer str=new StringBuffer(25);String s=”Hello”,若执行语句str.append(s)后,str.length()和str.capacity()的返回值为()。
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下面是一段javabean程序,该程序的运行结果是 () 。public class NullTest { public static void main(String[] ?args) { int M = 0; String str = null; StringBuffer sb = new StringBuffer("= "); sb.append(str); sb.ap
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StringBuffer类提供 【9】 字符串对象的表示。
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StringBuffer、Math、Random