multiple markers at this line（Multiple markers at this line）

本文目录

• Multiple markers at this line
• Multiple markers at this line - Cannot instantiate the type Icon
• java中错误提示：Multiple markers at this line 为什么
• Multiple markers at this line - DataOutputStream cannot be resolved to a type
• Java中multiple markers at this line
• multiple markers at this line问题

Multiple markers at this line

public class a {public static void main(String args){String str=“Look, look!“;public String result = str.toUpperCase();System.out.println(String);}} 改成这个样子。

Multiple markers at this line - Cannot instantiate the type Icon

public IconD(){构造方法名称有误 改成public IconDemo(){Icon icon=new Icon(“d:\\玫瑰.jpg“);Icon是一个接口，只能new它的实现类。Icon icon = new ImageIcon(“d:\\玫瑰.jpg“);

java中错误提示：Multiple markers at this line 为什么

在接口中定义的这样的都是常量（static final修饰的变量都是常量），只要初始化了都不可以再改变，即不可以再重新赋值，即使在你的实现类里面，也不可以去改变他的值你这里初始化值为空字符串，所以不能在重新赋值了，可以修改成下面的package util;interface A{ // public static final String s = “武汉理工大学“ ; StringBuffer s =new StringBuffer(“武汉理工大学“); // 全局常量 // public abstract void M1() ; void M1() ; // 抽象方法 public void M2() ; // 抽象方法}class B implements A{ // 子类B实现了接口A public void M1(){ // 实现抽象方法 System.out.println(“HELLO WORLD!!!“) ; } public void M2(){ System.out.println(s); // 输出全局常量 }};public class Interfacesample2{ public static void main(String args){ B b = new B() ; //A.s=“清华大学“; //这句话出错! A.s.append(“222“); b.M1() ; b.M2() ; }};

Multiple markers at this line - DataOutputStream cannot be resolved to a type

public static void main(String args) {try {DataOutputStream output = new DataOutputStream(new FileOutputStream(“t.dat“));output.writeInt(1234);output.writeChars(“AB“);output.writeFloat(123.4F);}catch(Exception e){e.printStackTrace();}}改成这样就可以了，记得采纳

Java中multiple markers at this line

CsvWriter System1,System2, System3;switch(i):{case 1: System1 = new CsvWriter(“E:\\result\\System1 in condition that beta =“+tb+“, gama=“+tg+“+“.csv“); System2 = new CsvWriter(“E:\\result\\System2 in condition that beta =“+tb+“, gama=“+tg+“+“.csv“); System3 = new CsvWriter(“E:\\result\\System3 in condition that beta =“+tb+“, gama=“+tg+“+“.csv“); break;case 2: System1 = new CsvWriter(“E:\\result\\System1 in condition that gama=“+tg+“+“, beta =“+tb+“.csv“); System2 = new CsvWriter(“E:\\result\\System2 in condition that gama=“+tg+“+“, beta =“+tb+“.csv“); System3 = new CsvWriter(“E:\\result\\System3 in condition that gama=“+tg+“+“, beta =“+tb+“.csv“); break;default: System1 = new CsvWriter(“E:\\result\\System1 in condition that beta =“+tb+“, gama=“+tg+“+“.csv“); System2 = new CsvWriter(“E:\\result\\System2 in condition that beta =“+tb+“, gama=“+tg+“+“.csv“); System3 = new CsvWriter(“E:\\result\\System3 in condition that beta =“+tb+“, gama=“+tg+“+“.csv“); break;另外，文件名中，不可以有逗号等系统不允许的符号

multiple markers at this line问题

使用Eclipse 进行项目开发，在实现类中的方法前面如果添加@Override就提示“Multiple markers at this line”的错误，问题描述如下 Multiple markers at this line - The method getStudentByID(String) of type StudentBeanImpl must override a superclass method - implements mgr.jc.student.service.IStudentBean.getStudentByID出现上述问题的原因：JDK1.5不支持这种写法。实现接口方法需要重写抽象方法。 解决上述问题的方法如下： 方法1.选择Eclipse的Window→Preferences→Java→Compiler，把Compiler compliance level从1.5改成1.6。方法2.右击project选择最后一个properties选择左侧的java compiler,勾选里面的框框，把java器版本都改成1.6。方法3.右击project下的 JRE System Library→Properties,Execution environment 选择“JavaSE-1.6(JDK1.6.0_10)”,点击确定即可。上述3种方法都能解决题目中提到的问题，可以根据自己的习惯选择相应的解决方法。