compile Java Code - Java javax.tools

Java examples for javax.tools:JavaCompiler

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Description

compile Java Code

Demo Code


import javax.tools.JavaCompiler;
import javax.tools.JavaFileManager;
import javax.tools.JavaFileObject;
import javax.tools.ToolProvider;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Map;

public class Main{
    public static ClassFileManager compileCode(final String fqn,
            final CharSequence source) throws IOException {
        return compileCode(Collections.singletonMap(fqn, source));
    }//w w w . java  2 s . c o  m
    public static ClassFileManager compileCode(
            final Map<String, ? extends CharSequence> sources)
            throws IOException {
        final JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
        try (final JavaFileManager fileManager = CompilerUtils
                .getFileManager()) {
            final Collection<JavaFileObject> files = new ArrayList<>();
            for (final Map.Entry<String, ? extends CharSequence> entry : sources
                    .entrySet()) {
                files.add(CompilerUtils.sourceToFileObject(entry.getKey(),
                        entry.getValue()));
            }
            compiler.getTask(null, fileManager, null, null, null, files)
                    .call();
            return (ClassFileManager) fileManager;
        }
    }
}

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