类型强制转换

/**

*测试类型的强制转换

*/

public class TestTypeCast{

    public static void main(String[]args){

        double a1 = 3.1415;

        int a2 = (int)a1;//强制转换会损失精度

        System.out.println(a2);

        int a3 = 300;

        byte a4 = (byte)a3;//超出范围会变成不同的值

        System.out.println(a4);

        char a5 = 97;

        char a6 = (char)(a5 + 25);//char97是a +25强制转换成z

        System.out.println(a6);

    }

}