Question

我需要切断一半用户输入的字符串。我试过这个并没有用：

    Scanner sc = new Scanner(System.in);
    String nameOne = sc.nextLine();
    chars[] oneChars = new char[nameOne.length];
    double oneLength = oneChars.length / 2;
    Math.round(oneLength);
    int oneLen = (int)oneLength;
    String nameOneFinal = "";
    for(int i = 0; i == oneLen--; i++) {
        oneChars[i] = oneChars[oneLen];
        nameOneFinal = nameOneFinal + oneChars[i];
    }

Answer 1

final int mid = nameOne.length() / 2;
String[] parts = {
    nameOne.substring(0, mid), // 1st part
    nameOne.substring(mid), // 2nd part
};

Answer 2

使用substring方法......你可以做到例如：

public String extraEnd(String str) {

 String s = str.substring(str.length()/2);//it will have the last half of string 

 return s ;
}

Answer 3

使用SubString方法获取此

String str = "CutThisBytwo";
int len = str.length();
String firstHalfStr = str.substring(0, len/2);
String secondHalfStr = str.substring(len/2,len );
System.out.println(firstHalfStr);
System.out.println(secondHalfStr);

Answer 4

简单方法：使用String.substring(int index1, int index2)

艰难的道路：

String new = "";

for(int i = 0; (i < old.length() - 1) / 2; i++){

    new += old.charAt(i);

}

如果是家庭作业，艰难的方式可能会让你获得布朗尼积分，但如果不是坚持简单的话。

截断String的后半部分

4 个答案: