从

Java 6开始,您可以使用

JavaCompiler编译文本并返回

Diagnostic对象,告诉您文件有什么问题(如果有的话).因此,对于您的示例,您需要将编辑器的内容传递给JavaCompiler,运行它并报告任何问题.下面的示例假定编辑器文本写入文件.

示例代码：

要检查的文件

public class HelloBuggyWorld {

String test // missing a semicolon

public static void main (String [] args) {

System.out.println('Hello World!'); // should be double quoted

}

}

检查

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Formatter;

import java.util.List;

import java.util.Locale;

import javax.tools.Diagnostic;

import javax.tools.DiagnosticCollector;

import javax.tools.JavaCompiler;

import javax.tools.JavaFileObject;

import javax.tools.StandardJavaFileManager;

import javax.tools.ToolProvider;

public class JavaSyntaxChecker {

public static void main(String[] args) {

System.out.println(JavaSyntaxChecker.check("/path/to/HelloBuggyWorld.java"));

}

public static List check(String file) {

JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();

StandardJavaFileManager fileManager = compiler.getStandardFileManager(null, null, null);

Iterable extends JavaFileObject> compilationUnits =

fileManager.getJavaFileObjectsFromStrings(Arrays.asList(file));

DiagnosticCollector diagnostics = new DiagnosticCollector();

compiler.getTask(null, fileManager, diagnostics, null, null, compilationUnits).call();

List messages = new ArrayList();

Formatter formatter = new Formatter();

for (Diagnostic diagnostic : diagnostics.getDiagnostics()) {

messages.add(diagnostic.getKind() + ":\t Line [" + diagnostic.getLineNumber() + "] \t Position [" + diagnostic.getPosition() + "]\t" + diagnostic.getMessage(Locale.ROOT) + "\n");

}

return messages;

}

}

产量

从运行主方法.

[ERROR: Line [5] Position [124] HelloBuggyWorld.java:5: unclosed character literal

, ERROR: Line [5] Position [126] HelloBuggyWorld.java:5: ';' expected

, ERROR: Line [5] Position [131] HelloBuggyWorld.java:5: not a statement

, ERROR: Line [5] Position [136] HelloBuggyWorld.java:5: ';' expected

, ERROR: Line [5] Position [137] HelloBuggyWorld.java:5: unclosed character literal

]