技術標籤：學習java

StringBuilder轉化為String

    String str = "abcdefghijklmnopqrs";
    StringBuilder stb = new StringBuilder(str);

整型陣列轉化為字串

    StringBuilder s = new StringBuilder();
    for(i=1;i<=n;i++) {
        s.append(String.valueOf(a[i]));
    }
    String str = ""+s;
                    
 

字串轉化為整形陣列

    String str="123456";
    int[] a = new int[str.length()];
    for(int i=0;i<str.length();i++) {
        a[i]  = str.charAt(i)-'0';
    }

字串轉化為字元陣列

    String str="123456";
    char[] c = str.toCharArray() ;
    System.out.println(c);

字元陣列轉化為字串

    char[] c = {'a','s','d','4','5',};
    String str = new String(c);
    System.out.println(str);
 

字元陣列轉化為整型陣列

    char[] c = { '1', '2', '3', '4', '5', };
    int[] a = new int[c.length];
    for (int i = 0; i < 5; i++) {
        a[i] = c[i] - '0';
        System.out.println(a[i]);
    }

整型陣列轉化為字元陣列

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