StringBuffer和String如何进行相互转换？

从String转换到StringBuffer:

1.通过StringBuffer的构造方法

public static void main(String[] args) {
String s = "hello";
StringBuffer b = new StringBuffer(s);
}

2.通过StringBuffer的append()方法

public static void main(String[] args) {
String s = "hello";
StringBuffer b = new StringBuffer();
(s);
}
}

StringBuffer转换为String:

1.通过String构造方法

public static void main(String[] args) {
String s = "hello";
StringBuffer b = new StringBuffer();
(s);
String ss =new String(b);
}

2.通过toString()方法

public static void main(String[] args) {
String s = "hello";
StringBuffer b = new StringBuffer(s);
String ss = ();

}

3.使用substring方法

public static void main(String[] args) {
String s = "hello";
StringBuffer b = new StringBuffer();
(s);
String y = (0,());
(y);
}