/
LongestCommonPrefix.java
40 lines (36 loc) · 1.11 KB
/
LongestCommonPrefix.java
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package DynamicProgram;
public class LongestCommonPrefix {
public static void main(String[] args) {
LongestCommonPrefix lcs = new LongestCommonPrefix();
String[] input = { "r", "rockbottom", "rollingstone","r"};
System.out.println(lcs.getSubstring(input));
}
public String getSubstring(String[] input) {
int minLen=Integer.MAX_VALUE;
for(int i=0;i<input.length;i++)
if(minLen>input[i].length())
minLen=input[i].length();
String base = input[0];
for (int i = 0; i < minLen; i++) {
for (int j = 1; j < input.length; j++) { // Run for all words
String comparer = input[j];
if (i >= comparer.length()
|| comparer.charAt(i) != base.charAt(i))
return base.substring(0, i);
}
}
return "";
}
public String getSubstring2(String[] input) {
String base = input[0];
for (int i = 0; i < base.length(); i++) {
for (int j = 1; j < input.length; j++) { // Run for all words
String comparer = input[j];
if (i >= comparer.length()
|| comparer.charAt(i) != base.charAt(i))
return base.substring(0, i);
}
}
return "";
}
}