正確結果為5 我代碼輸出為8 沒找出問題 求指教class Test { public static void main(String[] args) { String s = "sunjavacjavaeeejavapuujavakkkjava"; int count = 0; int x = 0; if (s.contains("java")) { x = s.indexOf("java"); count++; } int y = x + 4; for (int z = 0; z != -1 && y < s.length(); y += 4) { z = s.indexOf("java", y); count++; } System.out.println(count); }}
3 回答
慕蓋茨4494581
TA貢獻1850條經驗 獲得超11個贊
String s = "javasunjavacjavaeeejavapuujavakkkjavaiijavajava";int count = 0;int y=0;for (int z = 0; z!=-1 && y < s.length()-4; y = z+4) {
z = s.indexOf("java", y);
if (z != -1) { count++;
}
}
System.out.println(count);直接循環判斷，不等于-1就加一個。
慕尼黑8549860
TA貢獻1818條經驗 獲得超11個贊
public static void main(String[] args) { String s = "sunjavacjavaeeejavapuujavakkkjava"; int y = 0; while (s.indexOf("java")!=-1){
y++;
s = s.substring(s.indexOf("java")+4);
}
System.out.println(y);
}
FFIVE
TA貢獻1797條經驗 獲得超6個贊
public static void main(String[] args) { String s = "sunjavacjavaeeejavapuujavakkkjava"; int oldLength = s.length();
s = s.replaceAll("java", ""); int count = (oldLength - s.length()) / 4;
System.out.println(count);添加回答
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