轉自https://www.cnblogs.com/javacatalina/p/6641338.html

一、字元陣列轉字串

方法1

char[] str = {'a','b','d'};
StringBuffer sb = new StringBugger();
for(int i=0;i<str.length;i++){
	sb.append(str[i]);
}

String s = sb.toString();

方法2

char[] data = {'a','b','c'};
String s = new String(data);

二、字串到字元陣列

String str = "123abc";
char[] ar = str.toCharArray();

 

三、整型與字串

String str = Integer.toString(i);

int i = Integer.valueOf(str).intValue();