stringbuffer和string的相互转换

1:String和StringBuffer的相互转换

1://string--转stringbuffer

String s1="java";

StringBuffer sb1=newStringBuffer(s1);

//方式2;

StringBuffer sb2=newStringBuffer();

sb2.append("java");

System.out.println("sb1:="+sb1);

System.out.println("sb2:="+sb2);

2://stringbuffer-转string2

StringBuffer buffer=newStringBuffer("java");

//方式1:通过构造方法

String s3=newString(buffer);

//方式2:通过tostring方法

String s4=buffer.toString();

System.out.println("s3:="+s3);

System.out.println("s4:="+s4);