Java 基本数据类型转换

1. Integer/int  转 String

Integer a = 1; (int a = 1)

String b = Integer.toString(a);

2. float 转 String

float a = 1.0;

String b = String.valueOf(a) ;

3. 字符串转 Integer

String a ;

Integer b = Integer.parseInt(a) ;

4. String 转成float

String a;

float b = Float.valueOf(a) ;

5.long 转 float

long a;

float b = (float) a ;

6. long 转 int

long a;

int b = (int) a ;