j02050204.java

经典java教材《java完美经典》一书中源码的完全收集

import java.lang.*;

class j02050204
{
  public static void main(String para[])
  {
    String Str1 = new String("This is str1"); //用建构函数
    System.out.println("Str1 = " + Str1);  
       // 会自动将 Str1 内含之 char[] 中的每个字符逐一印出
    
    String Str2 = "This is str2";  //用原始资料型态的配置语法
    System.out.println("Str2 = " + Str2);
    
    String Str3 = new String();  //空字符串
    System.out.println("Str3 = " + Str3); //用原始资料型态的取值语法
    Str3 = "This is Str3";  //用原始资料型态的配置语法
    System.out.println("Str3 = " + Str3);
    
    //=============== 取内含之 char[] 值 =============== 
    char[] c1 = Str3.toCharArray();
    System.out.println("c1 数组内第一个字符 = " + c1[0]);
    System.out.println("c1 数组内第二个字符 = " + c1[1]);
    System.out.println("c1 数组内第三个字符 = " + c1[2]);
    System.out.println("c1 数组内第四个字符 = " + c1[3]);
  }
}