「javatype(s)」javatype属性
今天给各位分享javatype(s)的知识,其中也会对javatype属性进行解释,如果能碰巧解决你现在面临的问题,别忘了关注本站,现在开始吧!
本文目录一览:
- 1、报错JAVA The operator + is undefined for the argument type(s) String, void
- 2、JAVA报错:The operator != is undefined for the argument type(s) Double,double
- 3、java报错,怎么解决?
- 4、Java报错:The operator & is undefined for the argument type(s) int[], int
- 5、JAVA报错:The operator != is undefined for the argument type(s) int,null
报错JAVA The operator + is undefined for the argument type(s) String, void
paramDomain.setPatient_info_id(rs1.getString("mr_id")) 这个方法是void,没有返回值
JAVA报错:The operator != is undefined for the argument type(s) Double,double
Double.valueOf()方法需要String类型或double类型的参数。
要确定tf3.getText()的返回值是不是属于这两个类型的!
java报错,怎么解决?
语法错误 是指由于编程中输入不符合语法规则而产生的。程序编译就通不过,程序不能运行起来。此类错误最简单,调试起来比较容易 例如:表达式不完整、缺少必要的标点符号、关键字输入错误、数据类型不匹配、循环语句或选择..
Java报错:The operator & is undefined for the argument type(s) int[], int
for (int i = 0; i argb.length; i++) {
argb = (number 24) | (argb 0x00ffffff);// 修改最高2位的值
}
里面 改成argb[i] = (number 24) | (argb[i] 0x00ffffff);//
JAVA报错:The operator != is undefined for the argument type(s) int,null
null只是对对象有用,基本类型没有null。
package cn.edu.shu.web.test;
public class TestInteger {
public static void main(String[] args) {
/**
* 问题来源是在Struts2的action中,如果从session中取值,如果取不到的话,那么应该为null,由于我将其强转为Integer类型了,其后再将其与Integer比较时,居然抛空指针异常
*/
Object one = null;
Integer two = (Integer) one;
System.out.println(null == two);// out put true
System.out.println(two instanceof Integer);// out put false
System.out.println(two instanceof Object);// out put false
// System.out.println(0 == two);// 抛出空指针异常
// 思索,由于JDK有自动拆装箱操作,所以即使用的是Integer,其也会被拆箱为int类型,这样在使用操作符时,不满足int型和null型比较
// 编译错误: The operator == is undefined for the argument type(s) int, null
System.out.println(0 == null);
}
}
扩展资料
JAVA报错:The operator % is undefined for the argument type(s) int, String
import javax.speech.Central;
import javax.speech.EngineException;
import javax.speech.synthesis.*;
public class TrySpeech {
static Synthesizer synthesizer;
public static void main(String[] args) {
try {
synthesizer = Central.createSynthesizer(null);
synthesizer.allocate(); //这行运行时抛出空指针异常
} catch (EngineException e) {
}
try {
synthesizer.speak("Hello I am a computer", null);
synthesizer.speak("Hello I am a EMPcomputer/EMP", null);
synthesizer.speak(
"Hello I am a PROS PITCH=\" 10% \"computer/PROS", null);
} catch (Exception e) {
e.printStackTrace();
}
}
}
参考资料:百度百科 - JAVA
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