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Java基础知识----String和StringBuilder相互转换

ZMXQQ233 2022-04-16 阅读 92

测试代码如下:

package jib;

public class StringBuliderDemo01 {
    public static void main(String[] args) {
     /* //StringBuilder转化为String
        StringBuilder sb=new StringBuilder();
        sb.append("hello");
        //String s=sb;错误的做法
        //public String toString();通过toString()可转换
        String s=sb.toString();
        System.out.println(s);
    */
        //   String 转化为 StringBuilder
        String s = "hello";
        // StringBuilder sb=s;错误的做法
        //public StringBuilder(String s)通过构造方法实现String转化为StringBuilder
        StringBuilder sb = new StringBuilder(s);
        System.out.println(sb);

    }
}

 

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