Java FilePermission.newPermissionCollection()方法範例

FilePermission.newPermissionCollection()方法具有以下語法。

public PermissionCollection newPermissionCollection()

範例

在下面的程式碼中展示了如何使用FilePermission.newPermissionCollection()方法。

import java.io.FilePermission;
import java.io.IOException;
import java.security.PermissionCollection;

public class Main {

  public static void main(String[] args) throws IOException {

    // create new file permissions
    FilePermission  fp = new FilePermission("C://test.txt", "read");

    // create new permission collection
    PermissionCollection  pc = fp.newPermissionCollection();

    // add permission to the permission collection
    pc.add(fp);// Copyright: w  Ww .Y I Iba I. c  o m 

    if (pc.implies(new FilePermission("C://test.txt", "read"))) {
      System.out.println("Permission for C://test.txt is read");
    }
  }
}

上面的程式碼生成以下結果。

Permission for C://test.txt is read