Summary of mutual conversion methods between Java strings, shaping and floating point types

1. Convert strings into plastic and floating point types

 String s = "100"; //Method one int a = Integer.parseInt(String s); Long.parseLong(String s); Float.parseFloat(String s); Double.parseDouble(String s) //Method two int a = Integer.valueOf(s).intValue();

The difference: Integer.parseInt(String s) generates a plastic surgery;

Integer.valueOf(s).intValue() generates an object;

2. Convert plastic and floating point types into strings

 int i=11; //Method one String s=i+""; //Method two String s=String.valueOf(i); //Method three String s=Integer.toString(i);

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