boolean equals(Object obj)
描述 (Description)
java.io.FileOutputStream.equals(Object obj)方法检查两个FilePermission对象是否相等。 验证obj是否为FilePermission,并且具有与此对象相同的路径名和操作。
声明 (Declaration)
以下是java.io.FilePermission.equals(Object obj)方法的声明 -
public boolean equals(Object obj)
参数 (Parameters)
obj - 要与此对象进行相等性测试的对象。
返回值 (Return Value)
如果obj是FilePermission,则此方法返回true,并且具有与此对象相同的路径名和操作。
异常 (Exception)
NA
例子 (Example)
以下示例显示了java.io.FilePermission.equals(Object obj)方法的用法。
package com.iowiki;
import java.io.FilePermission;
import java.io.IOException;
public class FilePermissionDemo {
public static void main(String[] args) throws IOException {
FilePermission fp = null;
FilePermission fp1 = null;
FilePermission fp2 = null;
FilePermission fp3 = null;
boolean bool = false;
try {
// create new file permissions
fp = new FilePermission("C://test.txt", "read");
fp1 = new FilePermission("C://test1.txt", "read");
fp2 = new FilePermission("C://test.txt", "write");
fp3 = new FilePermission("C://test.txt", "read");
// checks two file permission objects for equality
bool = fp.equals(fp1);
// prints
System.out.println(bool);
// checks two file permission objects for equality
bool = fp.equals(fp2);
// prints
System.out.println(bool);
// checks two file permission objects for equality
bool = fp.equals(fp3);
// prints
System.out.print(bool);
} catch(Exception ex) {
// if an error occurs
ex.printStackTrace();
} finally {
}
}
}
让我们编译并运行上面的程序,这将产生以下结果 -
false
false
true