IoT JAVA 0811 - TestStr.java

public class TestStr {
    public static void main(String args[]) {
        String str1 = "Java Programming";
        String str2 = new String("Java Programming");
        System.out.println("str1=["+str1+"]");
        System.out.println("str2=["+str2+"]");
        String str3 = str1.substring(0,6);
        System.out.println("str3=["+str3+"]");
        String str4 = str2.substring(5);
        System.out.println("str4=["+str4+"]");

        int a = str1.indexOf("P");
        int b = str1.indexOf("p");
        int c = str1.indexOf("a",5);
        System.out.println("a:"+a+"/b:"+b+"/c:"+c);


        String str5 = "Java:Programming:Test";
        String str6 = "Java:Programming:Test:";


        //Professor's answer
        System.out.println("\n\n====");
        int sidx = 0; int eidx = 0;
        int fidx = str5.indexOf(":",sidx);

        while(fidx!=-1){
                  eidx = fidx;
                  System.out.println(str5.substring(sidx,eidx));
                  sidx = fidx + 1;
                  fidx = str5.indexOf(":",sidx);
        }
        System.out.println(str5.substring(sidx));

        //Solution1
        System.out.println("====");
        int strn = 0,  endn = 0,  find = 0;
        while(find!=-1)
        {
                    find = str5.indexOf(":",strn);
                    if(find==-1) endn=str5.length();
                    else endn = find;
                    System.out.println(str5.substring(strn,endn));
                    strn = endn +1;
        }

        //Solution2
        System.out.println("====");
        int startn = 0 , indexn=0;
        while(indexn!=-1)
        {
                indexn = str6.indexOf(":",startn);
                if(indexn == str6.length()-1)
                {
                    System.out.println(str6.substring(startn));
                    break;
                }
                else
                {
                    System.out.println(str6.substring(startn,indexn));
                    startn = indexn +1;
                }
        }

        //Solution3
        System.out.println("====");
        int strx=0 , endx=0;
        for(int i=0;endx>-1;i++)
        {
                endx = str5.indexOf(":",strx);
                if(endx!=-1)
                {
                          System.out.println(str5.substring(strx,endx));
                          strx = endx+1;
                }
                else System.out.println(str5.substring(strx));
        }
    }
}