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Java 将列表转换为带有空检查的对象数组。

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将列表转换为带有空检查的对象数组。

实例源码：

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Licensed under the Apache License, Version 2.0 (the "License");

you may not use this file except in compliance with the License.

You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software

distributed under the License is distributed on an "AS IS" BASIS,

WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

See the License for the specific language governing permissions and

limitations under the License.

$Id: //ariba/platform/util/core/ariba/util/core/ArrayUtil.java#9 $

//package com.nowjava;/** from n o w j a v a . c o m - 时  代  Java**/

import java.util.List;

public class Main {

public static void main(String[] argv) throws Exception {

System.out.println(java.util.Arrays.toString(array()));

}

/**

Convert a List into an Object array with null check.

@param vector a List to pull the contents from

@return a new Object array containing all elements of

vector, or a new empty Object array if vector was

null

@aribaapi documented

public static Object[] array(List vector) {

if (vector == null) {

return new Object[0];

}

return vector.toArray();

}
/** 来 自 NowJava.com - 时代Java**/

/**

Helper function to create a new empty Object array

@return a new empty Object array

@aribaapi documented

public static Object[] array() {

return new Object[] {};

}

/**

Helper function to create a new Object array containing one

Object.

@param a the first Object to add to the List

@return a new Object array containing the specified object

@aribaapi documented

public static Object[] array(Object a) {

return new Object[] { a };

}

/**

Helper function to create a new Object array containing two

Objects.

@param a the first Object to add to the List

@param b the second Object to add to the List

@return a new Object array containing the specified objects

@aribaapi documented

public static Object[] array(Object a, Object b) {

return new Object[] { a, b };

}

/**

Helper function to create a new Object array containing three

Objects.

@param a the first Object to add to the List

@param b the second Object to add to the List

@param c the third Object to add to the List

@return a new Object array containing the specified objects

@aribaapi documented

public static Object[] array(Object a, Object b, Object c) {

return new Object[] { a, b, c };

}

/**

Helper function to create a new Object array containing four

Objects.

@param a the first Object to add to the List

@param b the second Object to add to the List

@param c the third Object to add to the List

@param d the fourth Object to add to the List

@return a new Object array containing the specified objects

@aribaapi documented

public static Object[] array(Object a, Object b, Object c, Object d) {

return new Object[] { a, b, c, d };

}

/**

Helper function to create a new Object array containing five

Objects.

@param a the first Object to add to the List

@param b the second Object to add to the List

@param c the third Object to add to the List

@param d the fourth Object to add to the List

@param e the fifth Object to add to the List

@return a new Object array containing the specified objects

@aribaapi documented

public static Object[] array(Object a, Object b, Object c, Object d,

Object e) {

return new Object[] { a, b, c, d, e };

}

/**

Helper function to create a new Object array containing six

Objects.

@param a the first Object to add to the List

@param b the second Object to add to the List

@param c the third Object to add to the List

@param d the fourth Object to add to the List

@param e the fifth Object to add to the List

@param f the sixth Object to add to the List

@return a new Object array containing the specified objects

@aribaapi documented

public static Object[] array(Object a, Object b, Object c, Object d,

Object e, Object f) {

return new Object[] { a, b, c, d, e, f };

}

/**

Helper function to create a new Object array containing seven

Objects.

@param a the first Object to add to the List

@param b the second Object to add to the List

@param c the third Object to add to the List

@param d the fourth Object to add to the List

@param e the fifth Object to add to the List

@param f the sixth Object to add to the List

@param g the seventh Object to add to the List

@return a new Object array containing the specified objects

@aribaapi documented

*/
/**代码未完, 请加载全部代码(NowJava.com).**/

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编辑于 2020-03-26 09:23:272020-03-26 09:23:27

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