testpackage.java

本书是一本为Java学习者在基础内容学习结束后进行课程设计时提供参考的指导书

package apibook.c2.s3;

public class TestPackage {
  public static void main(String[] args) {
    Package[] pks= Package.getPackages();
    for (int i = 0; i < pks.length; i++) {
      System.out.println(pks[i].getName());
      System.out.println("Specification Title: "+pks[i].getSpecificationTitle());
      System.out.println("Specification Version: "+pks[i].getSpecificationVersion());
      System.out.println("Specification Vendor: "+pks[i].getSpecificationVendor());
      System.out.println("Implementation Title: "+pks[i].getImplementationTitle());
      System.out.println("Implementation Version: "+pks[i].getImplementationVersion());
      System.out.println("Implementation Vendor: "+pks[i].getImplementationVendor());
      if (pks[i].isSealed()) {
        System.out.println("Sealed: true");
      }

    }

  }
}