com.xiaoleilu.hutool.lang.Holder Maven / Gradle / Ivy
package com.xiaoleilu.hutool.lang;
import com.xiaoleilu.hutool.lang.mutable.MutableObj;
/**
* 为不可变的对象引用提供一个可变的包装,在java中支持引用传递。
* @author Looly
*
* @param 所持有值类型
*/
public final class Holder extends MutableObj{
private static final long serialVersionUID = -3119568580130118011L;
/**
* 新建Holder类,持有指定值,当值为空时抛出空指针异常
*
* @param 被持有的对象类型
* @param value 值,不能为空
* @return Holder
*/
public static Holder of(T value) throws NullPointerException{
if(null == value){
throw new NullPointerException("Holder can not hold a null value!");
}
return new Holder<>(value);
}
//--------------------------------------------------------------------------- Constructor start
/**
* 构造
*/
public Holder() {
super();
}
/**
* 构造
* @param value 被包装的对象
*/
public Holder(T value) {
super(value);
}
//--------------------------------------------------------------------------- Constructor end
}
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