Java Class toString()方法及示例

java.lang.Class类的toString()方法用于将该类的实例转换为字符串表示。该方法返回形成的字符串表示法。

语法。

public String toString()

参数。该方法不接受任何参数。

返回值。该方法返回该对象的字符串表示。

下面的程序演示了toString()方法。

例1:

// Java program to demonstrate toString() method
  
public class Test {
    public static void main(String[] args)
        throws ClassNotFoundException
    {
        // returns the Class object for the class
        // with the specified name
        Class c1 = Class.forName("java.lang.String");
  
        System.out.print("Class represented by c1: ");
  
        // toString method on c1
        System.out.println(c1.toString());
    }
}

输出:

Class represented by c1: class java.lang.String

例2:

// Java program to demonstrate toString() method
  
public class Test {
    public static void main(String[] args)
        throws ClassNotFoundException
    {
        // returns the Class object for the class
        // with the specified name
        Class c2 = int.class;
        Class c3 = void.class;
  
        System.out.print("Class represented by c2: ");
  
        // toString method on c2
        System.out.println(c2.toString());
  
        System.out.print("Class represented by c3: ");
  
        // toString method on c3
        System.out.println(c3.toString());
    }
}

输出:

Class represented by c2: int
Class represented by c3: void

参考资料: https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html#toString-