将'中'变为十六进制
char c1='中';
System.out.println(Integer.toHexString(c1));
char c2=0x4e2d;
char c3='\u4e2d';
System.out.println(c2+","+c3);
转为其他进制采用以下api
System.out.println(Integer.toBinaryString(num));//转2
System.out.println(Integer.toOctalString(num));//转8
System.out.println(Integer.toHexString(num));//转16