題目

代碼

public class Test28_MyStringBuilder2 {String s = "";// 無參構造方法public Test28_MyStringBuilder2(){}// 有參構造方法：導入字符數組public Test28_MyStringBuilder2(char[] chars){int len = chars.length;for (int i = 0 ; i < len ; i++){s += chars[i];}}// 有參構造方法：導入字符串public Test28_MyStringBuilder2(String s){this.s = s;}// 插入新字符串（導入對象）public Test28_MyStringBuilder2 insert(int offset, Test28_MyStringBuilder2 s) {char[] src = new char[this.s.length()];for (int i = 0; i < src.length; i++) {src[i] = this.s.charAt(i);}char[] inp = new char[s.s.length()];for (int i = 0; i < inp.length; i++) {inp[i] = s.s.charAt(i);}char[] to = new char[src.length + inp.length];int index = 0;for (; index < offset; index++) {to[index] = src[index];}for (int i = 0; index < inp.length; index++) {to[index] = inp[i];i++;}for (int i = offset; index < to.length; index++) {to[index] = src[i];}return new Test28_MyStringBuilder2(to);}// 翻轉public Test28_MyStringBuilder2 reverse(){int sl = s.length();char[] src = new char[sl], to = new char[sl];for (int i = 0; i < sl; i++) {src[i] = this.s.charAt(i);}for (int i = 0 ; i < sl ; i++){to[i] = src[sl - i - 1];}return new Test28_MyStringBuilder2(to);}// 截取public Test28_MyStringBuilder2 substring(int begin){char[] src = new char[s.length()];for (int i = 0; i < src.length; i++) {src[i] = this.s.charAt(i);}char[] feedback = new char[src.length - begin];for (int i = 0 ; begin < src.length ; begin++){feedback[i] = src[begin];i++;}return new Test28_MyStringBuilder2(feedback);}// 大寫public Test28_MyStringBuilder2 toUpperCase(){char[] src = new char[s.length()];for (int i = 0; i < src.length; i++) {src[i] = s.charAt(i);}int temp;for (int i = 0 ; i < src.length ; i++){temp = src[i];if (temp >= 98 && temp <= 133){temp -= 33;}}return new Test28_MyStringBuilder2(src);} }

總結

以上是生活随笔為你收集整理的Java黑皮书课后题第10章：**10.28（实现StringBuilder类）在Java库中提供了StringBuilder类。给出你对下面方法的实现（将新类命名为MyStringBuilder2）的全部內容，希望文章能夠幫你解決所遇到的問題。

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