方法: append(指定数据) 将指定数据添加到已有数据的结尾. 方法2:insert(index,数据内容) 返回类型:StringBuffer 方法: insert(index,数据内容) 将数据内容插入到指定的index位置中去. 删除: 方法1: delete(int start,int end) 删除缓冲区的数据. 返回类型:StringBuffer 方法: delete(int start,int end) 将数...
publicclassStringInsertExample{publicstaticvoidmain(String[]args){Stringoriginal="Hello World";StringtoInsert="Java ";intposition=6;// 插入位置StringBuildersb=newStringBuilder(original);sb.insert(position,toInsert);System.out.println("插入后的字符串: "+sb.toString());}} 1. 2. 3. 4. 5. 6....
```java public class Main { public static void main(String[] args) { StringBuilder sb = new StringBuilder("Hello"); sb.insert(0, " World"); // 在开始处插入 System.out.println(sb.toString()); // 输出 "WorldHello" sb.insert(6, " World"); // 在结尾处插入 System.out.println(sb...
String.valueOf(float), insert(int, java.lang.String), length()insertpublic StringBuffer insert(int offset, double d)Inserts the string representation of the double argument into this sequence. The second argument is converted to a string as if by the method String.valueOf, and the characters...
Insert(Int32, String, Int32, Int32) Added in 1. C# 复制 public Java.Lang.StringBuffer Insert(int dstOffset, string? s, int start, int end); Parameters dstOffset Int32 s String start Int32 end Int32 Returns StringBuffer Remarks Added in 1.5. Java documentation for java.lang...
例:String s="this is a demo of the getChars method."; char buf[]=new char[20]; s.getChars(10,14,buf,0); 4、getBytes() 替代getChars()的一种方法是将字符存储在字节数组中,该方法即getBytes()。 5、toCharArray() 6、equals()和equalsIgnoreCase() 比较两个字符串 ...
String类位于java.lang包中,Java程序默认导入java.lang包下的所有类。 Java字符串就是Unicode字符序列,例如字符串"Java"就是4个Unicode字符组成。 Java中没有内置的字符串类型,而是在标准Java类库中提供了一个预定义的类String,每个用双引号引起来的字符串都是String类的实例。 java允许使用符号“+”把两个字符串连...
按照执行顺序来 结果↓ buffer.insert(0,100); 100 buffer.insert(0,2.5F); 2.5100 buffer.insert(3,'*'); 2.5*100 buffer.insert(0,250.0D); 250.02.5*100 buffer.insert(5,"is equal to"); 250.0 is equal to 2.5*100 buffer.append('')在字符串尾部加空...
Method sb.append(); //在sb末尾加东西 StringBuffer insert(int offset, Object obj); //在offset位置插入 void setCharAt(int index, char ch); //设置index处的字符为ch StringBuffer delete(int start, int end); StringBuffer deleteCharAt(int index); int indexOf(String str); //返回sb中与string匹...
* When the intern method is invoked, if the pool already contains a * string equal to this {@code String} object as determined by * the {@link #equals(Object)} method, then the string from the pool is * returned. Otherwise, this {@code String} object is added to the ...