package String;

import org.junit.Test;

import java.util.Arrays;

public class StringTest1 {

@Test

//String和byte[]字节数组之间的转换

//编码：字符串-->字节

//解码：字节-->字符串

public void test3(){

String s1 = "abc123中国";

byte[] bytes = s1.getBytes();

System.out.println(Arrays.toString(bytes));

String str = new String(bytes);

System.out.println(str);

}

@Test

//String和char[]之间的转换

public void test2(){

String str1 = "abc123";

char[] charArray = str1.toCharArray();

for (int i = 0; i < charArray.length; i++) {

System.out.println(charArray[i]);

}

System.out.println("******************");

char[] arr = new char[]{'h','e','l','l','o'};

String str2 = new String(arr);

System.out.println(str2);

}

@Test

//String和基本数据类型，包装类的转换

public void test1(){

String str1 = "123";

int num = Integer.parseInt(str1);

num++;

System.out.println(num);

String str2 = String.valueOf(num);

System.out.println(str2);

}

}