package cn.jun;
public class StringDemo {
/* public static void main(String[] args) {
StringBuilder x = new StringBuilder("A");
StringBuilder y = new StringBuilder("B");
chang(x,y);
System.out.println(x + "." + y);
}
private static void chang(StringBuilder x, StringBuilder y) {
x.append(y);//append方法会把字符串追加到该字符串的系列
y=x;//不会改变的字符串
}*/
public static void main(String[] args) {
String x = new String("A");
String y = new String("B");
chang(x,y);
System.out.println(x+"."+y);
}
private static void chang(String x, String y) {
x = x + y;
x = "C"; //String是不可以变的,包括字符串和字符串长度
}
}
Sting和StringBuilder数据类型
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转载自blog.csdn.net/chenzuen113113/article/details/80002966
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