package 初学java;
public class stringbuilder中的tostring方法 {
public static void main(String[] args) {
//String--->StringBuilder
String s="hello";
StringBuilder s1=new StringBuilder(s);//*****
//往StringBuilder中添加数据。可有可无
s1.append(" world");
System.out.println("StringBuilder型的s1:"+s1);
//StringBuilder--->string
String s2=s1.toString();
System.out.println("String s2:"+s2);
}
}
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