The difference between valueOf, parseInt and toString in Java
1.parseInt() converts the String type into the int type.
Such as String a= "123";
int b = Integer .parseInt(a);
This way b is equal to 123.
2.ValueOf() method, for example, Integer.valueOf() converts the String type into the Integer type (note: it is the Integer type, not the int type. The int type is a simple type that represents numbers, and the Integer type It is a complex type that refers to )
For example:
String a= "123"; Integer c =Integer.valueOf(a); //Integer类型可以用int Value方法 转化为int类型 int b =c.intValue();
At this time, b is equal to 123
String.valueOf(int) returns the string representation of the int parameter.
This representation happens to be the result returned by the single-parameter Integer.toString method.
3. toString() can convert a reference type into the String string type.
The following example is the opposite of 2, converting Integer into String type:
Integer a = new Integer(123); String b =a.toString();
At this time, b is "123"
[Related recommendations]
1. Detailed explanation of valueOf method examples in java
2. The difference between valueOf and toString, (String) in Java
3 . Usage of tostring() and valueof() and the difference between the two
4.In-depth understanding of valueOf function and toString method
5. Introduction to object conversion functions toString() and valueOf()_
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