Methods to change the values of various types of variables in IDEA Debug mode

This article introduces the method of changing the values of various types of variables in IDEA Debug mode. It is shared with you. The details are as follows:

Test class

 import org.slf4j.LoggerFactory;import java.util.HashMap;import java.util.Map;/** * Created by PengHongfu 2018-04-18 18:21 */public class testClass { private static final org.slf4j.Logger logger = LoggerFactory .getLogger(testClass.class); public static void main(String args[]){ int a = 11; Map<String,Object> map = new HashMap<>(); map.put("name","Pi"); map.put("age",20); logger.info("a={},map={}",a,map); }}

In debug mode, after setting断点, the original value of variable a in the figure above 11 Click the green " + " sign in Watchs , enter the expression a=22 , and execute it downwards. You can find that the value of a becomes 22 .

For special types such as Map , List , etc., you can also assign values in a similar way to map.put("name","Hali") .

 com.ycjf.ycs.service.khgl.wxzlgl.testClass - a=22,map={name=Hali, age=20}

Note: The priority of expressions in Watchs is higher than that in the code

In the example, map.put("name","Hali") in Watchs is defined before the code map.put("name","Pi") is executed. name value in map is Hali throughout debug period and will not be overwritten by the code map.put("name","Pi") .

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