Merging collapsible if statements increases the code's readability.

src/main/java/org/wltea/analyzer/core/CN_QuantifierSegmenter.java

@@ -127,14 +127,12 @@ class CN_QuantifierSegmenter implements ISegmenter{
 		}
 		
 		//缓冲区已经用完，还有尚未输出的数词
-		if(context.isBufferConsumed()){
-			if(nStart != -1 && nEnd != -1){
-				//输出数词
-				outputNumLexeme(context);
-				//重置头尾指针
-				nStart = -1;
-				nEnd = -1;
-			}
+		if(context.isBufferConsumed() && (nStart != -1 && nEnd != -1)){
+			//输出数词
+			outputNumLexeme(context);
+			//重置头尾指针
+			nStart = -1;
+			nEnd = -1;
 		}	
 	}
 	
@@ -216,10 +214,9 @@ class CN_QuantifierSegmenter implements ISegmenter{
 			//找到一个相邻的数词
 			if(!context.getOrgLexemes().isEmpty()){
 				Lexeme l = context.getOrgLexemes().peekLast();
-				if(Lexeme.TYPE_CNUM == l.getLexemeType() ||  Lexeme.TYPE_ARABIC == l.getLexemeType()){
-					if(l.getBegin() + l.getLength() == context.getCursor()){
-						return true;
-					}
+				if((Lexeme.TYPE_CNUM == l.getLexemeType() ||  Lexeme.TYPE_ARABIC == l.getLexemeType())
+					&& (l.getBegin() + l.getLength() == context.getCursor())){
+					return true;
 				}
 			}
 		}

src/main/java/org/wltea/analyzer/core/LetterSegmenter.java

@@ -155,14 +155,12 @@ class LetterSegmenter implements ISegmenter {
 		}
 		
 		//判断缓冲区是否已经读完
-		if(context.isBufferConsumed()){
-			if(this.start != -1 && this.end != -1){
-				//缓冲以读完，输出词元
-				Lexeme newLexeme = new Lexeme(context.getBufferOffset() , this.start , this.end - this.start + 1 , Lexeme.TYPE_LETTER);
-				context.addLexeme(newLexeme);
-				this.start = -1;
-				this.end = -1;
-			}
+		if(context.isBufferConsumed() && (this.start != -1 && this.end != -1)){
+            //缓冲以读完，输出词元
+            Lexeme newLexeme = new Lexeme(context.getBufferOffset() , this.start , this.end - this.start + 1 , Lexeme.TYPE_LETTER);
+            context.addLexeme(newLexeme);
+            this.start = -1;
+            this.end = -1;
 		}
 		
 		//判断是否锁定缓冲区
@@ -203,14 +201,12 @@ class LetterSegmenter implements ISegmenter {
 		}
 		
 		//判断缓冲区是否已经读完
-		if(context.isBufferConsumed()){
-			if(this.englishStart != -1 && this.englishEnd != -1){
-				//缓冲以读完，输出词元
-				Lexeme newLexeme = new Lexeme(context.getBufferOffset() , this.englishStart , this.englishEnd - this.englishStart + 1 , Lexeme.TYPE_ENGLISH);
-				context.addLexeme(newLexeme);
-				this.englishStart = -1;
-				this.englishEnd= -1;
-			}
+		if(context.isBufferConsumed() && (this.englishStart != -1 && this.englishEnd != -1)){
+            //缓冲以读完，输出词元
+            Lexeme newLexeme = new Lexeme(context.getBufferOffset() , this.englishStart , this.englishEnd - this.englishStart + 1 , Lexeme.TYPE_ENGLISH);
+            context.addLexeme(newLexeme);
+            this.englishStart = -1;
+            this.englishEnd= -1;
 		}	
 		
 		//判断是否锁定缓冲区
@@ -254,14 +250,12 @@ class LetterSegmenter implements ISegmenter {
 		}
 		
 		//判断缓冲区是否已经读完
-		if(context.isBufferConsumed()){
-			if(this.arabicStart != -1 && this.arabicEnd != -1){
-				//生成已切分的词元
-				Lexeme newLexeme = new Lexeme(context.getBufferOffset() ,  this.arabicStart , this.arabicEnd - this.arabicStart + 1 , Lexeme.TYPE_ARABIC);
-				context.addLexeme(newLexeme);
-				this.arabicStart = -1;
-				this.arabicEnd = -1;
-			}
+		if(context.isBufferConsumed() && (this.arabicStart != -1 && this.arabicEnd != -1)){
+            //生成已切分的词元
+            Lexeme newLexeme = new Lexeme(context.getBufferOffset() ,  this.arabicStart , this.arabicEnd - this.arabicStart + 1 , Lexeme.TYPE_ARABIC);
+            context.addLexeme(newLexeme);
+            this.arabicStart = -1;
+            this.arabicEnd = -1;
 		}
 		
 		//判断是否锁定缓冲区