package com.string;

import org.apache.commons.lang.ObjectUtils;

import org.apache.commons.lang.math.NumberUtils;

/**

* @Author: EnjoyCoding

* @Date: 2020\3\30 0030 22:49

* @Description:

*/

public class IntegerTest {

public static void main(String[] args) {

// objectToString();

// nullTest();

// strToInteger();

}

public static void nullTest() {

// Object obj=null;

Object object="123";

String str= (object == null) ? null : object.toString();

System.out.println(str);

}

public static void objectToString() {

Object object=null;

// String str = ObjectUtils.toString(object);

String str = ObjectUtils.toString(object,null);

System.out.println("值为："+str);

}

public static void strToInteger() {

String str="abc";

//str不为数字时，设置默认值为 0

int num = NumberUtils.toInt(str);

//str不为数字时，设置默认值为其他值

int defaultNum=NumberUtils.toInt(str,123);

}

public void integerValueOfDemo() {

String str=null;

Integer value = Integer.valueOf(str);

System.out.println(value);

}

}