javac找不到symbol DefaultTableCellHeaderRenderer
javac找不到symbol DefaultTableCellHeaderRenderer
提问于 2018-06-12 03:51:47
你能告诉我在使用javac的时候什么是错误的吗？因为这个类是用Eclipse成功编译的。我给出以下CLI命令：
pardus@adige:/mylinuz/pocws/src/test/swing/component$ javac -verbose SortButtonRenderer.java
[parsing started SortButtonRenderer.java]
[parsing completed 12ms]
[search path for source files: .]
[search path for class files: /usr/lib/jvm/java-6-oracle/jre/lib/resources.jar,/usr/lib/jvm/java-6-oracle/jre/lib/rt.jar,/usr/lib/jvm/java-6-oracle/jre/lib/sunrsasign.jar,/usr/lib/jvm/java-6-oracle/jre/lib/jsse.jar,/usr/lib/jvm/java-6-oracle/jre/lib/jce.jar,/usr/lib/jvm/java-6-oracle/jre/lib/charsets.jar,/usr/lib/jvm/java-6-oracle/jre/lib/modules/jdk.boot.jar,/usr/lib/jvm/java-6-oracle/jre/classes,/usr/lib/jvm/java-6-oracle/jre/lib/ext/dnsns.jar,/usr/lib/jvm/java-6-oracle/jre/lib/ext/sunpkcs11.jar,/usr/lib/jvm/java-6-oracle/jre/lib/ext/localedata.jar,/usr/lib/jvm/java-6-oracle/jre/lib/ext/sunjce_provider.jar,.]
[loading java/awt/Component.class(java/awt:Component.class)]
[loading javax/swing/JLabel.class(javax/swing:JLabel.class)]
[loading javax/swing/JTable.class(javax/swing:JTable.class)]
SortButtonRenderer.java:8: package sun.swing.table does not exist
import sun.swing.table.DefaultTableCellHeaderRenderer;
^
SortButtonRenderer.java:10: cannot find symbol
symbol: class DefaultTableCellHeaderRenderer
public class SortButtonRenderer extends DefaultTableCellHeaderRenderer {
^
[loading java/lang/Object.class(java/lang:Object.class)]
[checking test.swing.component.SortButtonRenderer]
SortButtonRenderer.java:17: cannot find symbol
symbol : variable super
location: class test.swing.component.SortButtonRenderer
super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, col);
^
[loading javax/swing/JComponent.class(javax/swing:JComponent.class)]
[loading java/awt/Container.class(java/awt:Container.class)]
[loading java/awt/image/ImageObserver.class(java/awt/image:ImageObserver.class)]
[loading java/awt/MenuContainer.class(java/awt:MenuContainer.class)]
[loading java/io/Serializable.class(java/io:Serializable.class)]
[loading javax/swing/TransferHandler.class(javax/swing:TransferHandler.class)]
[loading javax/swing/TransferHandler$HasGetTransferHandler.class(javax/swing:TransferHandler$HasGetTransferHandler.class)]
[loading javax/swing/SwingConstants.class(javax/swing:SwingConstants.class)]
[loading javax/accessibility/Accessible.class(javax/accessibility:Accessible.class)]
SortButtonRenderer.java:19: cannot find symbol
symbol : method setHorizontalAlignment(int)
location: class test.swing.component.SortButtonRenderer
setHorizontalAlignment(JLabel.CENTER);
^
[loading java/lang/String.class(java/lang:String.class)]
SortButtonRenderer.java:20: cannot find symbol
symbol : method setText(java.lang.String)
location: class test.swing.component.SortButtonRenderer
setText((value == null) ? "" : value.toString());
^
SortButtonRenderer.java:21: incompatible types
found : test.swing.component.SortButtonRenderer
required: java.awt.Component
return this;
^
[total 297ms]
6 errors有趣的是，缺少的类，sun.swing.table.DefaultTableCellHeaderRenderer，在rt.jar中可用，编译器可以从rt.jar加载其他类，如java/awt/Color.class。
package test.swing.component;
import java.awt.Component;
import javax.swing.JLabel;
import javax.swing.JTable;
import sun.swing.table.DefaultTableCellHeaderRenderer;
public class SortButtonRenderer extends DefaultTableCellHeaderRenderer {
private static final long serialVersionUID = 1L;
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int col) {
super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, col);
setHorizontalAlignment(JLabel.CENTER);
setText((value == null) ? "" : value.toString());
return this;
}
//other methods removed
}请注意:当我运行java8的javac时，仍然出现错误。但是java8的javac加上"endorseddirs /usr/lib/jvm/java-6-oracle/jre/lib“就可以了。
回答 2
Stack Overflow用户
发布于 2018-06-12 04:19:20
您确定命令行和eclipse javac运行的是同一版本吗？(内存不足，但选项->search javac应该会显示哪个编译器)，javac -version会在命令行上给出正确的版本。
编辑:是的，而且一定要摆脱太阳。*进口！它们只会导致更多的痛苦。
Stack Overflow用户
发布于 2021-03-09 12:42:18
如果您需要保留一个sun.*类，并且使用maven打包，请将此配置添加到maven-编译器-plugin中：
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.1</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<compilerArgs>
<arg>-XDignore.symbol.file</arg>
</compilerArgs>
<fork>true</fork>
</configuration>
</plugin> 页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/50805083
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