質問編集履歴
1
コードに不適切な部分があった
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File without changes
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@@ -10,6 +10,8 @@
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```java
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Vector<Rectangle> shapes_ = new Vector<Rectangle>();
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Color BACK_COLOR = new Color(0,0,0,0);
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Color PEN_COLOR = Color.BLACK;
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@Override
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public void paintComponent( Graphics g )
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@@ -19,12 +21,12 @@
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r = shapes_.get( shapes_.size() - 1 );
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g.drawLine( r.x, r.y, r.width, r.height );
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}else if( shapes_.size() == 3 ){
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g.setColor( BACK_COLOR );
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r = shapes_.get( 1 );
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g.drawLine( r.x, r.y, r.width, r.height );
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g.setColor( PEN_COLOR );
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r = shapes_.get( 2 );
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g.drawLine( r.x, r.y, r.width, r.height );
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g.drawLine( r.x, r.y, r.width, r.height );
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}else{
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}
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}
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