可以使用一个变量或字段记录几个复合状态：
int a = 1;
System.out.println(a);
System.out.println("Integer.toBinaryString(a)=" +
Integer.toBinaryString(a));
System.out.println("Integer.toHexString(a)=" + Integer.toHexString(a));
System.out.println("Integer.toOctalString(a)=" +
Integer.toOctalString(a));
a = 2;
System.out.println(a);
System.out.println("Integer.toBinaryString(a)=" +
Integer.toBinaryString(a));
System.out.println("Integer.toHexString(a)=" + Integer.toHexString(a));
System.out.println("Integer.toOctalString(a)=" +
Integer.toOctalString(a));
a = 4;
System.out.println(a);
System.out.println("Integer.toBinaryString(a)=" +
Integer.toBinaryString(a));
System.out.println("Integer.toHexString(a)=" + Integer.toHexString(a));
System.out.println("Integer.toOctalString(a)=" +
Integer.toOctalString(a));
a = 8;
System.out.println(a);
System.out.println("Integer.toBinaryString(a)=" +
Integer.toBinaryString(a));
System.out.println("Integer.toHexString(a)=" + Integer.toHexString(a));
System.out.println("Integer.toOctalString(a)=" +
Integer.toOctalString(a));
int b = 1 | 2 | 4 | 8;
System.out.println("1 | 2 | 4 | 8 = " + b);
int b1 = 4;
System.out.println(b1 + " is In " + b + " ? " + ((b1 & b) == b1) );