字符串转换成基本数据类型

package com.API;

public class TestBao {
    public static void main(String[] args) {
//        int i = 10;
//        System.out.println(i + 10);
//        //基本数据类没有继承object面向对象的特征
//        System.out.println(i.toString());
        //byte -> Byte;
//        Integer i = new Integer(10);
//        Integer ii = 10;
//        System.out.println(ii + 10);
        //包装类封装了字符串
        String a = "1";
        String b = "1";
        System.out.println(a + b);
        //字符串转成可计算得 666
        //Integer.ParseInt();
        int c = Integer.parseInt(a);
        int D = Integer.parseInt(b);
        System.out.println(c);
        System.out.println(D);
        String e = "1.55";
        double f = Double.parseDouble(e);
        System.out.println(f);
        String h = "1.33333";
        double m = Double.parseDouble(h);
        System.out.println(m);

    }
}

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