import jdk.testlibrary.OutputBuffer; //导入依赖的package包/类
private void executeJava() throws Exception, IOException {
    String className = JavaProcess.class.getName();
    String classPath = System.getProperty("test.classes");
    ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
        "-Dtest.timeout.factor=" + System.getProperty("test.timeout.factor", "1.0"),
        "-cp", classPath, className, mainArgsIdentifier);
    OutputBuffer ob = ProcessTools.getOutput(pb.start());
    System.out.println("Java Process " + getMainArgsIdentifier() + " stderr:"
            + ob.getStderr());
    System.err.println("Java Process " + getMainArgsIdentifier() + " stdout:"
            + ob.getStdout());
}