字符、字符串、数组之间的转换

1 、 //把字符数组转化为字符串
char data[] = {'a','b','c'}; 

String str = new String(data);

System.out.println(str);

2、 //字符串之间可以相加
String cde = "cde";
System.out.println("abc"+cde );

3、 //把字符串数组转化为字符串
String[] str1 = {"abc","bcd","def"};

StringBuilder sb = new StringBuilder();

for (int i = 0; i < str1.length; i++) {

sb.append(str1[i]);
}
String s = sb.toString();

System.out.println(s);

4、 //将字符串转换为字符数组
String str2 = "hello";

char char1[] = str2.toCharArray();

for(int i=0;i<char1.length;i++){

System.out.print(char1[i]);

}
System.out.println("");

String str3 = new String(char1);

5、 //字符串与byte数组的转换
String str4 = "hello";

byte b[] = str4.getBytes();

String str5 = new String(b);

System.out.println(str5);