Java学习——Byte、Character



  1、

byte byte1 = (byte) 25;
  System.out.println(byte1);
  int count0 = (int)Byte.MAX_VALUE;
  byte count1 = Byte.MAX_VALUE;
  System.out.println(count0);
  System.out.println(count1);
  int count2 = (int)Byte.MAX_VALUE;
  byte count3 = Byte.MAX_VALUE;
  System.out.println(count2);
  System.out.println(count3);
  int count4 = Byte.SIZE;
  System.out.println(count4);

运行结果

25
127
127
127
127
8

2、Character

  char a0 = 'a';
  Character a1 = new Character('A');
  System.out.println(Character.toLowerCase(a1));
  System.out.println(Character.toUpperCase(a0));
  System.out.println(Character.isLowerCase(a1));
  System.out.println(Character.isUpperCase(a1));
  //Byte byte0 = new Byte(12);
  System.out.println(Character.MAX_CODE_POINT);
  System.out.println(Character.MAX_HIGH_SURROGATE);
  System.out.println(Character.MAX_RADIX);
  System.out.println(Character.MAX_VALUE);

运行结果：

a
A
false
true
1114111
?
36
?