【1】进制之间转换
@Test
public void testBinary() {
int i = 111;
String str = Integer.toBinaryString(i);
String str16 = Integer.toHexString(i);
String str8 = Integer.toOctalString(i);
Integer in = Integer.parseInt(str);
System.out.println(in);
System.out.println(str8);
System.out.println(str16);
int no = Integer.parseInt(str, 2);
System.out.println(no);
}