castingtest.java

《Java核心技术应用开发》电子工业出版社书籍源代码

/**
 * 这个类有编译错误
 * 演示了不同类型变量的转换
 */

package sample;
public class CastingTest {
    public void implictCasting() {
        byte a = 0x60;
        int ia = a;
        char b = 'a';
        int c = b;
        long d = c;
        long e = 1000000000L;
        float f = e;
        double g = f;
        String s = "hello";
        Object o = s;
    }
    
    public void explicitCasting() {
        long l = 1000000L;
        int i = l; //(int)l;
        double d = 12345.678;
        float f = d; //(float)d;
        Object o = new String("Hello");
        String str = o; //(String)o;
    }
}