正确例题 import java.util.*; public class Ha{ public static void main(String[] args) { String a[]={"a","b"}; for(int i=0;i<2;i++) for(int j=0;j<2;j++) System.out.print(a[i]+a[j]+"\n"); } }
正确例题 public class StrReplace { public static void main(String[] args) { String a="aa,ab,ba,bb"; a=a.replaceAll("a", "0"); a=a.replaceAll("b", "1"); System.out.println(a); } }
正确例题 public class StrReplace { public static void main(String[] args) { String a="abcdefgccc"; a=a.replaceAll("c", "8"); System.out.println(a); } }
正确例题 public class Test { public static void main(String[] args) { String s1 = "abcdefghijklmnopqrstuvwxyz"; String s2 = "abc"; if(s1.contains(s2)){ System.out.println("s1包含了s2"); System.out.println(s2); }else{ System.out.println("s1不包含s2"); } } }
正确例题 import java.util.*; public class Ha{ public static void main(String[] args) { String a[]={"a","b","c"}; String b[]={"a","b","c"}; System.out.println(Arrays.equals(a, b)); } }
正确例题 import java.util.*; public class Ha{ public static void main(String[] args) { String str1= "你好"; String str2= "你号"; if (str1.equals(str2)) { System.out.println("相等"); }else{ System.out.println("不相等"); } } }
