Java基本数据类型

1，int整型→包装类Integer 4字节

		int a=1;
		System.out.println(a);
		System.out.println(Integer.MAX_VALUE);
		System.out.println(Integer.MIN_VALUE);

2，long长整型→包装类Long 8字节

		long a=10L;
		System.out.println("a的值是:" + a);
		System.out.println("最大值是:" + Long.MAX_VALUE);
		System.out.println("最小值是:" + Long.MIN_VALUE);

3，double双精度浮点型→包装类Double 8字节

		double d=12.5;
		System.out.println(d);
		System.out.println(Double.MAX_VALUE);
		System.out.println(Double.MIN_VALUE);

4，float浮点型→包装类Float 4字节

		float f=12.3;
		System.out.println(f);

5，char字符数据类型→包装类Character 2字节

		char ch='a';
		System.out.println(ch);

	
		char ch2=97;
		System.out.println(ch2);

6，byte字节→包装类Byte 1字节

		byte b=12;
		System.out.println(b);
		System.out.println(Byte.MAX_VALUE);
		System.out.println(Byte.MIN_VALUE);

7，short短整型→包装类Short 2字节

		short sh=12;
		System.out.println(sh);
		System.out.println(Short.MAX_VALUE);
		System.out.println(Short.MIN_VALUE);

8，boolean布尔类型→包装类Boolean
在Java中没有规定明确大小，只有两个取值true false。且真只有true，假只有false