String,int,char,byte[]数组的相互转换

1. String 转换为int

String str = "abc";

int data =  Integer.parseInt(str);

或者

int data = Integer.valueOf(str);

2.int 型数据转换到String

int a = "3";

String str = Integer.valueOf(a).toString();

3.String 型数据转换为char型

String str = "abc";

char[] a = str.toCharArray();

4.char型转化为String型

char a ;

String str = Character.valueOf(a).toString();

5.String 型数据转换为byte[]数组

byte[] buf = new byte[1024];

String str = "abcd";

buf = str.getBytes()或者buf = str.getBytes("utf-8");

6.byte[]数组转换为String 型数据

byte[] buf = new byte[1024];
String str = new String(buf);
str= String.copyValueOf(str.toCharArray(), 0, buf.length]);