JavaSE Wrapper(包装类)

public class WrapperTest {
        //整形包装类
        Byte b = new Byte((byte)1);
        Short s = new Short((short)2);
        Integer i = new Integer(3);
        Long l = new Long(4);
        //浮点型包装类
        Float f = new Float(5.0f);
        Double d = new Double(6.0);
        //字符型包装类
        Character c = new Character('a');
        //布尔型包装类
        Boolean bo = new Boolean(true); 
        Integer ii = Integer.valueOf("120");
        //自动拆箱
        int iii = Integer.valueOf("111");
        //自动装箱
        Integer iiii = 1;
        //包装类.parseXXX将String类型转化为对应类型
        int aa = Integer.parseInt("123");
        //将long转为int
        long ll = 123456789;
        Integer il = Integer.parseInt(Long.valueOf(ll).toString());
        
}