= = and Equal in Java

For beginners, the = = and equal in Java tend to understand the logic easily confusing. Here is a simple record of the focus of understanding the two.

• = = compares the memory addresses with the same
• Equal need a few points of understanding
• Equal in the object class: is also used = = to compare, so it is also the address of the comparison
• Equal in other classes generally have the equal method overridden in object, depending on the specific class. Here is a detailed analysis of the equal method in the String class (because I understood the confusion-.-)
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  First understand the string buffer pool--you can point a reference to the same string content to the same in-memory content

• eg1:string a= "Hello"; String b = "Hello"; A, b refers to the same address because the virtual machine is assigned

• eg2:string a= "Hello"; String B=new string ("Hello"); b requires the allocation of new memory, so A/a reference address is different
• EG3:String a= "Hello"; String B=new string ("Hello"); B=b.intern ();//b invokes the method in Java.lang.String, which searches the string buffer for a reference to "Hello" in the pool, and returns the reference address if there is one. So here A, B refers to the same address
• The equal method of string
• Returns true for the same string contents, and False for different returns. See the API for details, as shown in the following example:
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The understanding of = = and equal first written here, but also give themselves a chance to understand ~

= = and Equal in Java