public String concat(String str) { int otherLen = str.length();if (otherLen == 0) { return this;} int len = value.length;char buf[] = Arrays.copyOf(value, len + otherLen);str.getChars(buf, len);//创建了一个新的Strin
publicclassStringBufferTest {publicstaticvoidmain(String[] args) { StringBuffer buf=newStringBuffer();//初始化StringBuffer对象buf.append(" is");//添加内容buf.insert(0,"This");//在第一个内容前添加内容buf.append(" StringBuffer").append("!");//支持连续操作buf.insert(buf.length()," Yes")...
int otherLen = str.length(); if (otherLen == 0) { return this; } int len = value.length; char buf[] = Arrays.copyOf(value, len + otherLen); str.getChars(buf, len); return new String(buf, true); } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 这段代码首先创建了一个字符数组...
publicString concat(String str) { intotherLen = str.length(); if(otherLen ==0) { returnthis; } charbuf[] =newchar[count + otherLen]; getChars(0, count, buf,0); str.getChars(0, otherLen, buf, count); returnnewString(0, count + otherLen, buf); } publicString replace(charold...
int otherLen = str.length(); if (otherLen == 0) { return this; } int len = value.length; char buf[] = Arrays.copyOf(value, len + otherLen); str.getChars(buf, len); return new String(buf, true); } } 从源码中我们可以看到，存储字符串的是用final修饰的...
public String concat(String str) { int otherLen = str.length(); if (otherLen == 0) { return this; } int len = value.length; char buf[] = Arrays.copyOf(value, len + otherLen); str.getChars(buf, len); return new String(buf, true); ...
this:newString(offset+beginIndex,endIndex-beginIndex,value);}publicStringconcat(String str){int otherLen=str.length();if(otherLen==0){returnthis;}char buf[]=newchar[count+otherLen];getChars(0,count,buf,0);str.getChars(0,otherLen,buf,count);returnnewString(0,count+otherLen,buf);}public...
str().length()<<endl; 运行结果: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 Size of ss = 2 Size of ss = 0 Size of ss = 2 80 90 stringstream与fstream 通过重载的<<和>>运算符可以将文件流中的数据输出到C++字符串中,它们之间的媒介是缓冲区streambuf,可由流的成员函数rdbuf()读取。
字符串开始，然后将 String::push_str &str子字符串切片放入其中一样，您可以使用 OsString::new ...
}publicString concat(String str) {intotherLen =str.length();if(otherLen == 0) {returnthis; }intlen =value.length;charbuf[] = Arrays.copyOf(value, len +otherLen); str.getChars(buf, len);returnnewString(buf,true); } 从源码可以看出,任何操作都是创建一个新的对象,不影响原对象 ...