Creating a new java.lang.String object using the default constructor wastes memory because the object so created will be functionally indistinguishable from the empty string constant "".

Java guarantees that identical string constants will be represented by the same String object. Therefore, you should just use the empty string constant directly.

Examples

Problematic Code

String a = new String("");

References

Spotbugs - DM_STRING_VOID_CTOR

Java

Use "" instead of new String() to create empty strings JAVA-S0063

Examples

Problematic Code

Recommended

References

Use `""` instead of `new String()` to create empty strings JAVA-S0063