摘自:http://blog.csdn.net/deaful/article/details/8096968
//通过append()方法连接各种类型的数据
/*public
class Append{
public static void main(String []args){
StringBuffer buf = new StringBuffer();
buf.append("Hello \n");
buf.append("Hello ").append("World!\n");
buf.append("数字:").append(1).append("\n");//代码链
buf.append("布尔:").append(true);
System.out.println(buf);
}
}*/
/*public class Append{
public static void main(String []args){
StringBuffer buf = new StringBuffer();
buf.append("Hello ");
fun(buf);
System.out.println(buf);
}
public static void fun(StringBuffer s){
s.append("MLDN ").append("LiXingHua");
}
}*/
//Hello MLDN LiXingHua
//直接使用insert()方法在指定位置上为StringBuffer添加内容
/*public class Append{
public static void main(String []args){
StringBuffer buf = new StringBuffer();
buf.append("Hello!!!");
buf.insert(0,"Hello ");
System.out.println(buf);
buf.insert(buf.length()," MLDN~~");
System.out.println(buf);
}
}*/
//字符串反转操作--reverse
/*public class Append{
public static void main(String []args){
StringBuffer buf = new StringBuffer();
buf.append("World!!!");
buf.insert(0,"Hello ");
String str = buf.reverse().toString();
System.out.println(str);
}
}*/
//替换指定范围的内容--replace
/*public class Append{
public static void main(String []args){
StringBuffer buf = new StringBuffer();
buf.append("Hello ").append("World!!");
buf.replace(6,11,"LiXiHua");
System.out.println(buf);
}
}*/
//字符串截取--substring
/*public class Append{
public static void main(String []args){
StringBuffer buf = new StringBuffer();
buf.append("Hello ").append("World!!");
buf.replace(6,11,"LiXiHua");
String str = buf.substring(6,15);
System.out.println(str);
}
}*/
//删除指定范围的字符串--delete
/*public class Append{
public static void main(String []args){
StringBuffer buf = new StringBuffer();
buf.append("Hello ").append("World!!");
buf.replace(6,11,"LiXiHua");
String str = buf.delete(6,15).toString();
System.out.println(str);
}
}*/
//查找指定的内容是否存在--indexOf
public class Append{
public static void main(String []args){
StringBuffer buf = new StringBuffer();
buf.append("Hello ").append("World!!");
if(buf.indexOf("Hello")==-1){
System.out.println("没有找到指定内容");
}else{
System.out.println("可以找到指定内容");
}
}
}