JAVA 进制和类型转换

1.10进制转换16进制

String hex= Integer.toHexString(numb);

2.10进制转换n进制

String hex = Integer.toString(10,n);

3.n进制转换10进制

方法1. 
BigInteger hex=new BigInteger("字符", n);
int num = hex.intValue();
System.out.println(num);
方法2.
int hex = Integer.parseInt("字符",n);

4.String 转换 Integer

String s="258";
int i=Integer.parseInt(s);
int t=Integer.valueOf(s);

5.String分割并转为int[]

String s = "6,6,6";
String[] ss = s.split(",");
int[] i = new int[ss.length];
for (int j = 0; j < ss.length; j++) {
     i[j] = Integer.valueOf(ss[j]);
}

6.String转Character[]

String s = "666";
char[] cha = s.toCharArray();