問題描述

我在一個 java 程序中有兩個字符串，我想以某種方式混合它們以形成兩個新字符串.為此，我必須從每個字符串中提取一些組成字符并將它們添加以形成新字符串.我有這樣的代碼(this.eka 和 this.toka 是原始字符串):

String muutettu1 = new String();字符串 muutettu2 = 新字符串()；muutettu1 += this.toka.charAt(0) + this.toka.charAt(1) + this.eka.substring(2);muutettu2 += this.eka.charAt(0) + this.eka.charAt(1) + this.toka.substring(2);System.out.println(muutettu1 + " " + muutettu2);

我正在獲取 .charAt(x) 部分的數字，那么如何將字符轉換為字符串?

只要使用 always use substring() 而不是 charAt()

在這種特殊情況下，值是可變的，因此，我們可以使用內置的 String 類方法 substring() 來解決這個問題(@see 下面的例子):

特定于 OP 用例的示例:

<代碼>muutettu1 += toka.substring(0,1) + toka.substring(1,2) + eka.substring(2);muutettu2 += eka.substring(0,1) + eka.substring(1,2) + toka.substring(2);

概念示例，(即示例顯示在嘗試使用此概念解決問題時采用的一般方法)

<代碼>muutettu1 += toka.substring(x,x+1) + toka.substring(y,y+1) + eka.substring(z);muutettu2 += eka.substring(x,x+1) + eka.substring(y,y+1) + toka.substring(z);

<塊引用>

...其中 x,y,z 是保存要提取的位置的變量."

I have two strings in a java program, which I want to mix in a certain way to form two new strings. To do this I have to pick up some constituent chars from each string and add them to form the new strings. I have a code like this(this.eka and this.toka are the original strings):

String muutettu1 = new String();
String muutettu2 = new String();
muutettu1 += this.toka.charAt(0) + this.toka.charAt(1) + this.eka.substring(2);
muutettu2 += this.eka.charAt(0) + this.eka.charAt(1) + this.toka.substring(2);
System.out.println(muutettu1 + " " + muutettu2);

I'm getting numbers for the .charAt(x) parts, so how do I convert the chars to string?

Just use always use substring() instead of charAt()

In this particular case, the values are mutable, consequently, we can use the built in String class method substring() to solve this problem (@see the example below):

Example specific to the OP's use case:

    muutettu1 += toka.substring(0,1) + toka.substring(1,2) + eka.substring(2);
   
    muutettu2 += eka.substring(0,1) + eka.substring(1,2) + toka.substring(2);

Concept Example, (i.e Example showing the generalized approach to take when attempting to solve a problem using this concept)

    muutettu1 += toka.substring(x,x+1) + toka.substring(y,y+1) + eka.substring(z);

    muutettu2 += eka.substring(x,x+1) + eka.substring(y,y+1) + toka.substring(z);

"...Where x,y,z are the variables holding the positions from where to extract."

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