コードでエラーを取得する

Question

「パブリックな多項式の乗算（多項式p）」および「公式多項式の加算（多項式p）」でエラーが発生します。なぜこれがわからないのですか？私はそれが間違っているとは思わない。ここにコードがあり、エラーを一番下に置きます。

import java.util.*; 
    class Term 
    { 
     private int coe; 
     private int pow; 
     public int getCoe() 
     {return coe;} 
     public int getPow() 
     {return pow;} 
     public void setCoe(int coe) 
     {this.coe=coe;} 
     public void setPow(int pow) 
     {this.pow=pow;} 
     public Term(int coe, int pow) 
     { 
      this.coe=coe; 
      this.pow=pow; 
     } 
     public String toString() 
     { 
      return "(" +coe+ "," +pow+ ")"; 
     } 
    } 
    class Polynomial 
    { 
     private LinkedList poly; 
     public Polynomial() 
     { 
      poly = new LinkedList(); 
     } 
     public void addTerm(int coe, int pow) 
     { 
      Term t = new term(coe,pow); 
      poly.addLast(t); 
     } 
     public void print() 
     { 
      ListIterator iter = poly.listIterator(); 
      while(iter.hasNext()) 
      { 
       term temp = (Term) iter.next(); 
       System.out.print(temp); 
      } 
      System.out.println(); 
     } 
     public void insert(int coe, int pow) 
     { 
      Term temp = new Term(coe,pow); 
      ListIterator iter = poly.listIterator(); 

      while(iter.hasNext()) 
      { 
       Term t = (Term)iter.next(); 
       if(t.getPow() == temp.getPow()) 
       { 
        t.setCoe(t.getCoe()+temp.getCoe()); 
        return; 
       } 
       else if(t.getPow() < temp.getPow()) 
       { 
        iter.previous(); 
        iter.add(temp); 
        return; 
       } 
       iter.add(temp); 
      } 
      public Polynomial add(Polynomial p) 
      { 
       Polynomial a = new Polynomial(); 
       ListIterator iter = poly.listIterator(); 
       ListIterator pIter = p.poly.listIterator(); 

       while(iter.hasNext()) 
       { 
        Term t =(Term)pIter.next(); 
        a.insert(t.getCoe(),t.getPow()); 
       } 
       return a; 
      } 
      public Polynomial multiply(Polynomial p) 
      { 
       Polynomial m = new Polynomial(); 
       ListIterator iter = poly.listIterator(); 

       while (iter.hasNext()) 
       { 
        Term t = (Term)iter.next(); 
        ListIterator pIter = (p.poly).listIterator(); 
        while (pIter.hasNext()) 
        { 
         Term temp = (Term)pIter.next(); 
         m.insert(t.getCoe() * temp.getCoe(), t.getPow() + temp.getPow()); 
        } 
       } 
       return m; 
      } 
     } 
     public class PolynomialTest 
     { 
      public static void main (String [] args) 
      { 
       Polynomial p = new Polynomial(); 
       p.addTerm(-10,0); 
       p.addTerm(-1,1); 
       p.addTerm(9,7); 
       p.addTerm(5,10); 

       Polynomial p2; 
       p2 = p.multiply(p); 
       p2.print(); 
      } 
     } 

これは私が受けているエラーです。

PolynomialTest.java:67: error: illegal start of expression 
     public Polynomial add(Polynomial p) 
     ^
PolynomialTest.java:67: error: ';' expected 
     public Polynomial add(Polynomial p) 
          ^
PolynomialTest.java:67: error: ';' expected 
     public Polynomial add(Polynomial p) 
             ^
PolynomialTest.java:80: error: illegal start of expression 
     public Polynomial multiply(Polynomial p) 
     ^
PolynomialTest.java:80: error: ';' expected 
     public Polynomial multiply(Polynomial p) 
           ^
PolynomialTest.java:80: error: ';' expected 
     public Polynomial multiply(Polynomial p) 
              ^
PolynomialTest.java:112: error: reached end of file while parsing 
    } 
    ^
7 errors 

私は何が間違っていたか、どのように修正できるかを知っていただければ幸いです。

Answer 1

あなたはこれ以上のように見えます。あなたはaddとmultiplyの機能をinsertの機能の中に宣言しました。

ここにコードが修正されました。

import java.util.*; 
    class Term 
    { 
     private int coe; 
     private int pow; 
     public int getCoe() 
     {return coe;} 
     public int getPow() 
     {return pow;} 
     public void setCoe(int coe) 
     {this.coe=coe;} 
     public void setPow(int pow) 
     {this.pow=pow;} 
     public Term(int coe, int pow) 
     { 
      this.coe=coe; 
      this.pow=pow; 
     } 
     @Override 
     public String toString() 
     { 
      return "(" +coe+ "," +pow+ ")"; 
     } 
    } 
    class Polynomial 
    { 
     private LinkedList poly; 
     public Polynomial() 
     { 
      poly = new LinkedList(); 
     } 
     public void addTerm(int coe, int pow) 
     { 
      Term t = new Term(coe,pow); 
      poly.addLast(t); 
     } 
     public void print() 
     { 
      ListIterator iter = poly.listIterator(); 
      while(iter.hasNext()) 
      { 
       Term temp = (Term) iter.next(); 
       System.out.print(temp); 
      } 
      System.out.println(); 
     } 
     public void insert(int coe, int pow) 
     { 
      Term temp = new Term(coe,pow); 
      ListIterator iter = poly.listIterator(); 

      while(iter.hasNext()) 
      { 
       Term t = (Term)iter.next(); 
       if(t.getPow() == temp.getPow()) 
       { 
        t.setCoe(t.getCoe()+temp.getCoe()); 
        return; 
       } 
       else if(t.getPow() < temp.getPow()) 
       { 
        iter.previous(); 
        iter.add(temp); 
        return; 
       } 
       iter.add(temp); 
      } 
     } 
      public Polynomial add(Polynomial p) 
      { 
       Polynomial a = new Polynomial(); 
       ListIterator iter = poly.listIterator(); 
       ListIterator pIter = p.poly.listIterator(); 

       while(iter.hasNext()) 
       { 
        Term t =(Term)pIter.next(); 
        a.insert(t.getCoe(),t.getPow()); 
       } 
       return a; 
      } 
      public Polynomial multiply(Polynomial p) 
      { 
       Polynomial m = new Polynomial(); 
       ListIterator iter = poly.listIterator(); 

       while (iter.hasNext()) 
       { 
        Term t = (Term)iter.next(); 
        ListIterator pIter = (p.poly).listIterator(); 
        while (pIter.hasNext()) 
        { 
         Term temp = (Term)pIter.next(); 
         m.insert(t.getCoe() * temp.getCoe(), t.getPow() + temp.getPow()); 
        } 
       } 
       return m; 
      } 
     } 

     public class PolynomialTest 
     { 
      public static void main (String [] args) 
      { 
       Polynomial p = new Polynomial(); 
       p.addTerm(-10,0); 
       p.addTerm(-1,1); 
       p.addTerm(9,7); 
       p.addTerm(5,10); 

       Polynomial p2; 
       p2 = p.multiply(p); 
       p2.print(); 
      } 
     } 

Answer 2

あなたのブレースに注意してください。

public insert { 
    // do stuff 
} // <- end of insert method 

public add { 
    // do add stuff 
} 

public multiply { 
    // do multiply stuff 
}