Java 数据类型转换

int iValue = new Integer(strValue).intValue();
String str = intObj.toString();
int number = Integer.parseInt(str);

public static Object read(String value, Class type) {
        Object ret = value;
        if (Integer.TYPE.equals(type)) {
            ret = Integer.valueOf(value);
        }
        if (Byte.TYPE.equals(type)) {
            ret = Byte.valueOf(value);
        }
        if (Short.TYPE.equals(type)) {
            ret = Short.valueOf(value);
        }
        if (Long.TYPE.equals(type)) {
            ret = Long.valueOf(value);
        }
        if (Float.TYPE.equals(type)) {
            ret = Float.valueOf(value);
        }
        if (Double.TYPE.equals(type)) {
            ret = Double.valueOf(value);
        }
        if (Boolean.TYPE.equals(type)) {
            ret = Boolean.valueOf(value);
        }
        if (Character.TYPE.equals(type)) {
            ret = value.charAt(0);
        }
        // TODO others.
        return ret;
    }

String.valueOf(value)

REF:

http://way2java.com/casting-operations/data-type-casting-type-conversion/