Java swing画随机圆

[{"title":"（ 6 个子文件 3KB ） Java swing画随机圆","children":[{"title":"第二题","children":[{"title":"MainFrame.class <span style='color:#111;'> 689B </span>","children":null,"spread":false},{"title":"Circle.class <span style='color:#111;'> 618B </span>","children":null,"spread":false},{"title":"MyPanel.class <span style='color:#111;'> 1.08KB </span>","children":null,"spread":false},{"title":"MyPanel.java <span style='color:#111;'> 838B </span>","children":null,"spread":false},{"title":"Circle.java <span style='color:#111;'> 390B </span>","children":null,"spread":false},{"title":"MainFrame.java <span style='color:#111;'> 373B </span>","children":null,"spread":false}],"spread":true}],"spread":true}]