我正在试验 Java 反射和内联字符串,得出的结果让我感到困惑。
import java.lang.reflect.Field;
public class HappyDebugging {
public static void main(String[] args) throws Exception {
defineTrueFalse();
System.out.println("true is " + true); // why is it "true is true"?
System.out.println("false is " + false);
System.out.println(true);
System.out.println(false);
System.out.println("true");
System.out.println("false");
System.out.println("true is " + Boolean.valueOf(true));
System.out.println("false is " + Boolean.valueOf(false));
System.out.println("true is " + Boolean.valueOf("true"));
System.out.println("false is " + Boolean.valueOf("false"));
}
static void defineTrueFalse() throws Exception{
Field field = String.class.getDeclaredField("value");
field.setAccessible(true);
field.set("true", new char[] {'f', 'a', 'l', 's', 'e'});
field.set("false", new char[] {'t', 'r', 'u', 'e'});
field = String.class.getDeclaredField("offset");
field.setAccessible(true);
field.setInt("true", 0);
field.setInt("false", 0);
field = String.class.getDeclaredField("count");
field.setAccessible(true);
field.setInt("true", 5);
field.setInt("false", 4);
}
}
为什么输出的前两行是
true is true
false is false
我希望他们是
true is false
false is true
请注意不同平台的输出不同。
最佳答案
这似乎有效....
String.valueOf(BooleanValue)
关于java - 使用反射更改 boolean 字符串值不起作用,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/8728820/