[BAEL-5661] Integer.toString(int i) vs String.valueOf(int i) (eugenp#12606)

sdhiray7 · web-flow · commit 132818d35675 · 2022-08-17T17:34:12.000+02:00
* Initial commit for Object copy in Java

* review comments commit for Object copy in Java

* Initial commit for parseInt vs valueOf java

* Review comments commit for parseInt vs valueOf java

* Modify readme

* review comments

* build failure

* build failure retry

* build failure retry remove parseInt(java.lang.String,int,int,int)

* build failure add comment

* change examples

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* Initial commit for get current stacktrace

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diff --git a/core-java-modules/core-java-string-conversions-2/src/test/java/com/baeldung/inttostring/IntToStringUnitTest.java b/core-java-modules/core-java-string-conversions-2/src/test/java/com/baeldung/inttostring/IntToStringUnitTest.java
@@ -1,4 +1,4 @@
-package com.baeldung.chararraytostring;
+package com.baeldung.inttostring;
 
 import static org.junit.Assert.assertEquals;
 
@@ -23,7 +23,8 @@ public void whenValidIntIsPassed_thenShouldConvertToValidString() {
     @Test(expected = NullPointerException.class)
     public void whenNullIntegerObjectIsPassed_thenShouldThrowException() {
         Integer i = null;
-        System.out.println(String.valueOf(i)); // it prints "null"
-        System.out.println(i.toString()); 
+        // NOTE: primitive int can never be null, we are checking this example to check in what case the exception is thrown by these methods.
+        System.out.println(String.valueOf(i)); // prints "null" as the call goes to String.valueOf(Object obj) method
+        System.out.println(i.toString()); // throws NPE
     }
 }

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-package com.baeldung.chararraytostring;`
	`1`	`+package com.baeldung.inttostring;`
`2`	`2`
`3`	`3`	`import static org.junit.Assert.assertEquals;`
`4`	`4`
`@@ -23,7 +23,8 @@ public void whenValidIntIsPassed_thenShouldConvertToValidString() {`
`23`	`23`	`@Test(expected = NullPointerException.class)`
`24`	`24`	`public void whenNullIntegerObjectIsPassed_thenShouldThrowException() {`
`25`	`25`	`Integer i = null;`
`26`		`- System.out.println(String.valueOf(i)); // it prints "null"`
`27`		`- System.out.println(i.toString());`
	`26`	`+ // NOTE: primitive int can never be null, we are checking this example to check in what case the exception is thrown by these methods.`
	`27`	`+ System.out.println(String.valueOf(i)); // prints "null" as the call goes to String.valueOf(Object obj) method`
	`28`	`+ System.out.println(i.toString()); // throws NPE`
`28`	`29`	`}`
`29`	`30`	`}`